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Zanule, Paul Gudoi. "Road Management System and Road Safety in Uganda." ScholarWorks, 2015. https://scholarworks.waldenu.edu/dissertations/368.
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Traffic collisions cost Uganda millions of dollars each year. The purpose of this descriptive case study was to describe the strategies and processes needed to implement a road management system. Such a system would significantly reduce the fatalities and accidents in Uganda, improve the transportation within Kampala's business district, and increase business profitability. Three conceptual theories framed the research study: management theory, strategic management theory, and criminology theory. Using a snowball sampling strategy, data were collected from open-ended interviews, questionnaires, observations, and archived documents from 20 administrative participants in the government and organizational leaders involved in the transport operations and transport services in the Kampala business district in Uganda. Data were analyzed using 3 phases: (a) interpretational analysis, coding, and grouping segments; (b) structural analysis, consistency, and quality; and (c) reflective analysis, consequences, what, when, where, and how. Five themes or action requirements emerged from the data analysis: to improve transport operations and transport services profitability, reduce traffic jams and fatalities, provide sufficient driving training, maintain road infrastructure, and maintain traffic law enforcement. The findings and recommendations from this study may improve the profitability of businesses, reduce the traffic jams and fatalities, and improve the gross domestic product of Uganda, thereby contributing to positive social change.
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Reddy, Nitin. "DRIVER ASSISTANCE FOR ENHANCED ROAD SAFETY AND TRAFFIC MANAGEMENT." Case Western Reserve University School of Graduate Studies / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1237493386.
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Comte, Samantha L. "Intelligent speed adaptation : evaluating the possible effects of an innovative speed management system on driver behaviour and road safety." Thesis, University of Leeds, 2001. http://etheses.whiterose.ac.uk/2617/.
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The research reported in this thesis provides a comprehensive safety evaluation of Intelligent Speed Adaptation (ISA) using a range of experimental methodologies. An ISA system can have varying system characteristics but, in general, limits a vehicle to a particular speed (or provides advice about the appropriate speed). This evaluation offers an important contribution to the understanding of a range of issues pertinent to the implementation of such a technology. This thesis reports a series of studies designed to evaluate the effect of ISA on driver behaviour and safety. Each of the studies addressed a separate issue and thus a number of research methodologies were used. The studies evaluated the effectiveness of ISA in comparison to other speed-reducing methods and investigated how drivers interacted with ISA across a variety of road types. In addition, a number of variants of ISA were developed and their comparative effectiveness was studied in a laboratory setting and in the real world. In summary, the simulator studies reported decreases in mean and maximum speeds for areas of interest such as curves and village entry points. The field studies on the other hand only found decreases in maximum speeds, probably due to the small sample and high variability in traffic conditions. However these decreases in speed were located in road environments where excessive speed is a problem; thus safety benefits would undoubtedly accrue with ISA. With regards to system design, drivers were more accepting of an ISA system that allowed an override particularly self-reported speeders. Increases in frustration and the perceived loss of time while driving with a mandatory ISA were also reported and may explain the negative shift in gap acceptance behaviour and car following observed in the simulator.
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Vitmosse, Sara. "Increased Safety on Cycling Paths by Improving Road Maintenance : A Concept to Report Faults and Provide Grades on Cycling Paths." Thesis, KTH, Hållbarhet och miljöteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-232320.
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Urbanisation is increasing and more sustainable transport modes are promoted, in both the sustainable development goals and the national goals. Sweden has developed a national cycling strategy, with the purpose to improve cycling infrastructure and make more people chose the bike. While cycling is good for both environment, reduced congestion and personal health, the traffic mode comes with high risk of accidents. Insufficient operation and maintenance is one of the main causes of single accidents involving cyclists. To improve the road quality on existing paths, this study has in collaboration with NCC, developed a concept for reporting issues on paths for cyclists directly to the road manager. The aim is to increase the efficiency of inspections on cycling paths and to cover more risk related aspects. A pilot area was chosen, due to variations in contracts for NCC’s operational areas in Sweden. The choice of pilot area was Borås, based on type of contract, local initiatives and sufficient information available. The methodology of this project consisted of a general literature review, followed with a deeper study of contracts and seminars in Borås. The seminars provided local insight from the NCC workers and cyclists familiar in the area. A grading system for the reports was obtained through a multi-criteria analysis in which criteria was combined with weights based on risk factor to demonstrate the urgency from more sides than just the contact. An analysis of the strengths, weaknesses, opportunities and threats was made to evaluate the concept. The result is in the form of a reporting system where cyclists can register errands about problems on their cycling paths in a mobile application. An NCC administrator at the main local office will organise the reports into the relevant criterion and score it according to urgency. The errand is then graded based on the score combined with a weight for that criterion to represent the risk factor. Colour coded symbols will appear on a digital map, giving NCC a good overview of the cycling path that can help them prioritise and schedule maintenance more efficiently. It is expected that some of the reports will concern problems outside of NCC contract boarders, these will be handled separately in a Grey Zone. Either the errand will be forwarded to responsible road manager, or it will be used in action proposals to the contract holder. For this system to work, it is important that the users stay engaged. This is attained with a feedback mechanism allowing the user to follow the report throughout the process. It will be possible to receive notifications when the status of an errand is updated. During a seminar with local cyclists, personalised feedback was preferred. A suggestion to meet this request is given in the form of a gamification feature, where points and achievements illustrate the importance of the cyclist’s reports. To attract users, different incentives such as discounts or service might be necessary. A final recommendation from this project is to create a system with the intention to collaborate with local initiatives and stakeholders. The value of this concept lay in increased efficiency and quality of operation and maintenance of cycling path that will lead to a safer environment for the citizens.Då befolkningsmängden i städerna ökar blir kravet på hållbarare transportmedel allt mer påtagligt. Sverige har utvecklat en nationell cykelstrategi med målet att öka cykelinfrastrukturen och få fler att välja cykeln. Att cykla har många fördelar, förutom att den är mer platseffektiv i trafiken och kan minska trafikstockningar, är den också bra för miljön och den personliga hälsan. En av de främsta nackdelarna är dock risken för olyckor, och bristande drift och underhåll av cykelvägarna är en av huvudorsakerna till singelolyckor med cyklister. För att förbättra vägkvalitén på de befintliga vägarna har den här studien, i samarbete med NCC, tagit fram ett koncept där cyklister kan rapportera in fel direkt till väghållaren. Målet är att effektivisera kontrollerna av cykelvägarna och integrera riskfaktorer i prioritering av arbetet. Borås valdes som pilotområde för denna studie då kontrakt för drift och underhåll varierar mellan olika områden. Valet av pilotområde baserades på lokala engagemang, medlemskap i Svenska Cykelstäder och kontraktsmodellen. NCC har ett regionalt kontrakt med Trafikverket för Boråsområdet vilket är fördelaktigt då dessa kontrakt är mer generella än lokala kontrakt. Arbetet började med en generell litteraturstudie i ämnet, efterföljt av en djupare studie av Boråskontraktet och seminarier för att fånga lokala förhållanden och önskemål. Utifrån detta utvecklades ett betygssystem med hjälp av en multikriterieanalys där kriterier från kontraktet vägs samman med en riskfaktor för att öka insikten hos väghållaren om vikten av ett problem på cykelvägen och göra det lättare att prioritera arbeten. Slutligen utfördes en analys av styrkor, svagheter, möjligheter och hot för att utvärdera konceptet. Ett konceptuellt rapporteringssystem där cyklister kan anmäla fel på cykelvägarna de använder dagligen via en mobil applikation är resultatet av denna studie. Ärendet hanteras via det lokala driftkontoret av en administratör som kategoriserar problemet och registrerar hur allvarligt det är. Via betygssystemet erhåller ärendet en prioriteringsordning och färgkodade symboler på en digital karta ger en bra överblick av cykelvägarnas kvalité som kan användas vid planering av underhållsarbetet. Det är också förväntat att detta system kommer ta emot rapporter som berör problem utanför NCC:s kontraktsramar, dessa hanteras i en så kallad Gråzon. Ärendena här kan antingen vidarebefordras till ansvarig väghållare eller användas för att skapa åtgärdsförslag till den aktuella kontraktshållaren. Det är viktigt att bibehålla cyklisternas intresse för rapporteringssystemet. Detta är tänkt att uppnås med hjälp av ett kontinuerligt återkopplingssystem där rapporterna kan följas genom hela hanteringsprocessen. Det ska också finnas en möjlighet för cyklisten att få notiser när ärendets status uppdaterats. Intresset för personlig återkoppling var stor, enligt deltagare i ett av seminarierna. Då det är tidskrävande för väghållaren att hantera ärenden på en personlig nivå föreslogs därför ett typ av personligt poängsystem med utmärkelser som ska illustrera vikten av rapporterna. Olika typer av belöningssystem i form av rabatterade erbjudanden eller cykelservice skulle ytterligare fånga cyklisters intresse för applikationen. En slutlig rekommendation är att skapa ett system i nära samarbete med de olika intressenterna. Värdet av det här konceptet ligger i den ökade effektiviteten och kvalitén av drift och underhåll på cykelvägar som leder till en säkrare miljö för medborgarna.
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Zaidi, Syed Muhammad Zaier Abbas. "Mobility and safety evaluation of integrated dynamic merge and speed control strategies in work zones." Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4613.
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An already calibrated and validated VISSIM model for Simplified Dynamic Lane Merge System (SDLMS) in accordance with the real life work zone was modified with a VSL through Vehicle Actuated Programming (VAP) code. Three different logics were coded each for VSL alone, early SDLMS+VSL and late SDLMS+VSL. All these logics were fine tuned with several test runs before finalizing it for the final simulation. It is found through the simulation of above mentioned scenarios that for low and medium volume levels (V0500, V1000 and V1500), there is no significant difference between the Maintenance of Traffic (MOT) plans for mean throughputs. However, for higher volume levels (V2000 and V2500), late SDLMS with and without VSL produced higher mean throughputs for all compliance rates and truck percentages except when the demand volume was 2,500 vph and compliance of 60%, where it produces the significantly lower mean throughputs. In terms of travel time through the work zone, results indicated that there is no significant difference between MOT types for demand levels of V0500 and V1000 when compliance is 40% or less but for compliance of 60% and more, only demand volume level that is not significantly different from other MOT types is V0500. This study revealed that VSL increases travel time through the work zone. This might be due to non-compliant vehicles that follow the compliant vehicle ahead unless they find a sufficient gap in adjacent lane to pass the compliant vehicle. It is also found out that VSL makes the system safer at higher volumes (2,000 vph and 2,500 vph). This was observed through safety surrogate measures selected for this study.; Another outcome of this study is that the addition of VSL to the dynamic merge systems helps in improving the overall safety of the system by lowering speed variances and deceleration means of the vehicles travelling through the work zone. The passage of traffic through the work zone is made safer when a speed control is integrated to a dynamic merge system. It can be inferred from the simulation results that integrated SDLMS and VSL systems have better performance in terms of traffic mobility and safety than existing individual controls and also show that the integrated SDLMS and VSL system has more potential than each individual systems.; In recent years, there has been a considerable increase in the amount of construction work on the U.S. national highways. Most of the work undertaken is the reconstruction and rehabilitation of the existing transportation networks. Work zones in the United States are likely to increase in number, duration and length due to emphasis on repair and highway reconstruction as a significant portion of all federal-aid highway funds are now geared toward highway rehabilitation. The challenge of mobility is particularly acute in work zone areas as road repair and construction intensifies traffic issues and concentrates them in specific locations and at specific times. Due to the capacity drop, which is the result of lane closure in work zone area, congestion will occur with a high traffic demand. The congestion increases number and severity of traffic conflicts which raise the potential for accidents; furthermore traffic operational properties of roadway in work zone area become worse. Intelligent Transportation System (ITS) technologies have been developed and are being deployed to improve the safety and mobility of traffic in and around work zones. In several states in the US, the use of Dynamic Merge Controls also known as Dynamic Lane Merge (DLM) system has been initiated to enhance traffic safety and to improve traffic flow in work zone areas. The DLM usually takes two forms; dynamic early merge and dynamic late merge. The use of variable speed limit (VSL) systems at work zones is also one of those measures. VSL systems improve safety by helping the driver in determining the maximum speed that drivers should travel. Besides adding improvement to safety, they are also expected to improve mobility at the work zones.; The main goal of this study is to evaluate the safety and operational effectiveness of the dynamic merge systems i.e. the dynamic early lane merge and dynamic late lane merge, in the presence of VSL system. More specifically, the VISSIM model is utilized to simulate a two-to-one lane configuration when one out of the two lanes in the work zone is closed for traffic. Six different scenarios were adopted to assess the effectiveness of these scenarios under different traffic demand volumes and different drivers' compliance rates to the messages displayed by the systems. These scenarios are; bullet] Work Zone without VSL and without SDLMS or the current Motorist Awareness System (MAS) bullet] Work Zone with VSL and without SDLMS bullet] Work Zone with VSL and Early SDLMS bullet] Work Zone with VSL and Late SDLMS bullet] Work Zone with early SDLMS and without VSL bullet] Work Zone with early SDLMS and without VSLID: 029050385; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (M.S.)--University of Central Florida, 2010.; Includes bibliographical references (p. 189-192).
M.S.
Masters
Department of Civil and Environmental Engineering
Engineering and Computer Science
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Shea, Edward. "Calibration of Snowmaking Equipment for Efficient Use on Virginia's Smart Road." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/44622.
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Virginia's Smart Road, to be completed by early 2000, is a test bed for numerous research activities including snow and ice control, remote sensor testing, snow removal management, safety and human factors, and vehicle dynamics. An all-weather testing system will feature 75 automated snowmaking towers. In order to provide timely and repeatable weather scenarios, equipment operators will need to understand fully the limitations and capabilities of the snowmaking system.
The research presented herein addresses the hydraulic and hydrologic variables and design methodology to implement efficient snowmaking at a transportation research facility. Design variables include nozzle configuration, water pressure and flowrate, compressed air pressure and flowrate, tower orientation, snow inducer concentration, water and compressed air temperature, and ambient weather conditions. Testing and data collection was performed at the Snow Economics, Inc. research and development site at Seven Springs Mountain Resort in Champion, PA. The results of this work will be used to guide the operators of the Smart Road on the most efficient use of the snowmaking equipment.Master of Science
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Kahrle, Atterlord Naomi. "Framgångsfaktorer för etablering av ledningssystemstandarderna ISO 14001 och ISO 39001." Thesis, Linnéuniversitetet, Institutionen för biologi och miljö (BOM), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-27393.
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Standarder för ledningssystem är ett hjälpmedel för företag och myndigheter att bedriva arbete i en viss fråga. Spridningen och etableringen av ledningssystemstandarder är beroende av flera faktorer. I och med lanseringen av det nya ledningssystemet för trafiksäkerhet, ISO 39001, vill Trafikverket förstå vilka framgångsfaktorer som finns för ett väletablerat ledningssystem. Detta görs genom att utvärdera ett ledningssystem som har kommit att få god global spridning och etablering, miljöledningssystemet ISO 14001. Syftet med denna uppsats är att utreda vilka framgångsfaktorerna är för etableringen och spridningen av miljöledningssystemet, ISO 14001, för att sedan se om dessa går att applicera på trafiksäkerhetsledningssystemet, ISO 39001. För att besvara detta genomfördes en litteraturstudie som kompletterades med en empirisk undersökning. Den empiriska undersökningen utgjordes av semistrukturerade intervjuer som genomfördes med fyra aktörer med god kännedom om den nya trafiksäkerhetsstandarden. Uppsatsen visade att de framgångsfaktorerna som kan relateras starkast till ISO 14001 är dess koppling till ISO 9001, den rådande tidsandan samt fördelar som ökade marknadsandelar genom god publicitet vid certifiering. De krav som ställdes på underleverantörer från redan certifierade företag är också en betydande faktor. Även om trafiksäkerhet fått större utrymme på världsagendan under senare år var inte trafiksäkerhetsengagemanget lika stort vid lanseringen av ISO 39001 som miljöengagemanget var vid lanseringen av ISO 14001. Spridningen av ISO 39001 beror även på regeringsstöd, med förhoppning om att den införs i lagstiftningen då nollvisionen är ett riksdagsbeslut. Den offentliga sektorn tog initiativ till arbetet med ISO 39001 och efterfrågan kan bidra till att ISO 39001 når stora framgångar inom den offentliga sektorn. ISO 39001 har föregåtts av en nollvision och en nationell branschspecifik säkerhetsstandard som har banat vägen för standarden inom vissa sektorer. De verksamheter som inför ISO 39001 kommer troligtvis göra detta för att uppfylla marknadskrav och myndighetskrav. En viktig framgångsfaktor för ISO 39001 är att den ger förutsättningar för företag att ställa krav på sina underleverantörer, något som bekräftades vid intervjuerna.
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Reiman, A. (Arto). "Holistic work system design and management:— a participatory development approach to delivery truck drivers’ work outside the cab." Doctoral thesis, Oulun yliopisto, 2013. http://urn.fi/urn:isbn:9789526202198.
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Abstract The road freight transport industry as a labour-intensive sector is dependent on the work ability and well-being at work of employees. The majority of the occupational accidents are related to work phases outside the cab. These work phases, which are performed in various different work environments, contain several kinds of ergonomic discomforts. This poses complex challenges for the employers from a safety and productivity point of view. The framework of this thesis is based on the foundations of ergonomics and design science. The main objective was to provide knowledge that can be implemented into the design and management of work systems for local and short haul delivery operations. Material was obtained from two sources. A meta-synthesis was performed to frame holistic management in a human perspective. Furthermore, additional in-depth design knowledge was obtained through participatory ergonomics video analyses on drivers’ work outside the cab. Video analyses resulted in 262 identifications of demanding work situations where ergonomic discomforts and risks of accidents occurred. Sudden over-exertions and strains, falls and slips as well as losing control of work equipment were the most common deviations related to drivers’ work outside the cab and mainly related to physical activities of movement and carrying by hand. The majority of the work situations identified were performed in cargo spaces or elsewhere within the truck structure or at premises and yards that are administered by the customers or other stakeholders. In these environments, drivers tend to perform their work manually or using different types of work equipment. This thesis provides new in-depth knowledge on drivers’ work outside the cab. The results show that different stakeholders can contribute to drivers’ work systems. The knowledge provided by drivers and other stakeholders can be applied to holistic design and management processes at company level. Moreover, the knowledge can also be applied to broader value chain design and management processesTiivistelmä Tieliikenteen tavarankuljetus työvoimavaltaisena toimialana on riippuvainen henkilöstön työkyvystä ja -hyvinvoinnista. Suurin osa tapaturmista liittyy työtehtäviin ohjaamon ulkopuolella. Näitä töitä tehdään hyvin vaihtelevissa työympäristöissä ja niihin työtehtäviin liittyy monenlaisia ergonomisia haittakuormitustekijöitä. Tämä asettaa haasteita niin työsuojelun kuin tuottavuuden näkökulmasta. Väitöskirjan viitekehys pohjautuu ergonomiaan sekä suunnittelutieteeseen. Tavoitteena on tuottaa tietoa, jota voidaan hyödyntää työjärjestelmien suunnittelussa ja johtamisessa erityisesti maaliikenteen jakelukuljetuksissa. Materiaali koostui kahdesta osiosta. Metasynteesillä muodostettiin näkemys kokonaisvaltaisesta johtamisesta ihmisnäkökulmasta. Lisäksi kuljettajat ja sidosryhmien edustajat analysoivat osallistuvan ergonomian keinoin videoaineistoa jakelukuljettajien työstä ohjaamon ulkopuolella. Videoanalyyseissa tunnistettiin yhteensä 262 työtilannetta, jossa esiintyy erilaisia ergonomisia haittakuormitustekijöitä sekä mahdollisia tapaturmariskejä. Äkilliset fyysiset kuormitukset, putoamiset, liukastumiset ja kaatumiset sekä työvälineiden hallinnan menettäminen olivat yleisimpiä tunnistettuja poikkeamia kuljettajan työssä. Pääasiassa nämä liittyivät kuljettajan liikkumiseen sekä erilaisten taakkojen kantamiseen. Valtaosassa (85 %) havainnoista kuljettaja työskenteli ajoneuvon kuormatilassa tai päällirakenteissa tai asiakkaiden tai muiden sidosryhmien hallinnoimissa työympäristöissä. Näissä työympäristöissä kuljettaja työskenteli sekä manuaalisesti käsin että hyödyntäen erilaisia apuvälineitä. Väitöskirja tarjoaa uudenlaista syvällistä tietoa kuljettajan työstä ohjaamon ulkopuolella. Eri sidosryhmät voivat osaltaan vaikuttaa kuljettajan työjärjestelmiin. Kuljettajien ja sidosryhmien tuottamaa tietoa voidaan soveltaa työjärjestelmien kokonaisvaltaisessa suunnittelussa ja johtamisessa niin yritystasolla kuin myös suunniteltaessa ja johdettaessa laajempia arvoketjuja
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Simões, Fernanda Antonio. "SEGTRANS : sistema de gestão da segurança no trânsito urbano." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-09052016-112557/.
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Neste trabalho é apresentado um modelo de sistema de gestão da segurança no trânsito urbano, denominado SEGTRANS, que visa a redução dos acidentes de trânsito e a minimização dos conflitos de tráfego, com conseqüente aumento da segurança e do conforto para os usuários. O SEGTRANS contempla a organização de um banco de dados com informações sobre acidentes, conflitos de tráfego, sistema viário e zoneamento urbano, em programas de planilha eletrônica e sistema de informações geográficas; o desenvolvimento de técnica mista de avaliação da segurança viária com dados de acidentes, conflitos de tráfego e meio ambiente viário; o tratamento dos dados com a produção de relatórios e mapas temáticos; a sistemática para a definição das ações a serem implementadas visando reduzir os acidentes; e o processo de avaliação das medidas adotadas. Alguns dos principais estudos desenvolvidos no trabalho foram: definição da técnica de conflitos de tráfego, seleção das variáveis e formação do banco de dados de acidentes com montagem de programa em Access para introdução dos dados, técnica mista de avaliação da segurança viária, técnica de avaliação por carro teste e caminhada teste e tratamento dos dados em programas de planilha eletrônica e sistema de informação geográfica.This work presents a model of management system for urban traffic safety, denominated SEGTRANS, which seeks the reduction of traffic accidents and the reduction of traffic conflicts, with consequent increase of safety and comfort for the users. The SEGTRANS contemplates the organisation of a database with information on accidents, traffic conflicts, road system and urban zoning, in electronic spreadsheet programs and geographic information systems; a development of a mixed technique of evaluation of the road safety with data of accidents, traffic conflicts and road environment; a treatment of the data with the production of reports and thematic maps; system for definition of actions to be implemented seeking to reduce the accidents; and a process of evaluation of the adopted measures. Some of the main studies developed in this work included: definition of the traffic conflict technique, selection of variables and formation of a database of accidents with program assembly in Access for introduction of data, a mixed technique of evaluation of the road safety, an evaluation technique for car test and walking test and treatment of data in electronic spreadsheet programs and geographic information systems.
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Fricheteau, Romain. "Cadrage général pour une évaluation des performances des action de sécurité routière." Phd thesis, Ecole Centrale Paris, 2011. http://tel.archives-ouvertes.fr/tel-00711474.
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L'OMS évalue à 1.2 million le nombre de tués sur les routes par an et environ 20 à 50 millions le nombre de blessés (données de 2004). Même si on observe une nette amélioration dans certains pays développés, l'OMS a prévu une augmentation mondiale des décès et des traumatismes d'ici 2030 si rien de nouveau n'est effectué. Pour faire face à cette problématique, les recommandations reposent sur la mise en œuvre de stratégies globales d'amélioration. Celles-ci doivent prendre en compte l'ensemble des enjeux liés à la sécurité routière (santé publique, technologique, économique, juridique, etc.) et être conduites en collaboration par l'ensemble des acteurs du système routier. Par exemple, le travail des constructeurs automobiles consiste en partie à développer des systèmes de sécurité qui agissent dans l'objectif de réduire et/ou d'éviter les accidents (ceinture de sécurité, ABS, airbag, châssis adapté aux déformations, etc.) à partir de connaissances en accidentologie et en biomécanique dans l'objectif de répondre aux exigences de tests consuméristes. L'activité d'évaluation fait partie intégrante de ce processus d'amélioration de la sécurité routière. Elle a pour objectif de fournir des connaissances aux différents acteurs pour les aider à atteindre leurs objectifs. Plus précisément, elle est focalisée sur le calcul d'indicateurs qui renseignent sur les performances des actions de sécurité routière. Le travail de recherche que nous avons effectué est issu d'une réflexion globale sur la réalisation de ces évaluations. Nous avons identifié des enjeux que nous considérons comme levier pour améliorer leur réalisation. Ils concernent la formalisation d'un cadre de l'évaluation pour aider les évaluateurs à dépasser leurs habitudes de travail et ainsi mieux répondre aux besoins des destinataires des évaluations dans un contexte complexe. En se basant sur les connaissances expertes de l'évaluation en sécurité routière et la littérature sur l'évaluation, l'épistémologie, la modélisation des connaissances et les théories de conception, nous avons proposé un modèle générique, créatif et multipoints de vue de l'évaluation. Ce modèle est défini comme une description systémique de l'activité d'évaluation. Il est composé de modèles structurels et fonctionnels à destination des évaluateurs. Dans notre recherche, nous nous sommes focalisés sur les étapes d'analyse du cas d'étude et sur la conception des indicateurs d'évaluation. Notre modèle a été mis à l'épreuve sur des exemples d'évaluation. Les résultats montrent que la formalisation des cas d'évaluations engendre une réflexion plus détaillée sur les questions à traiter et les indicateurs à utiliser. Un outil logiciel permet de rendre opérationnel ce modèle. Il est basé sur la gestion de bases de données et sur des algorithmes de traitement des données.
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Downey, Matthew Blake. "Evaluating the Effects of a Congestion and Weather Responsive Advisory Variable Speed Limit System in Portland, Oregon." PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2397.
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Safety and congestion are ever present and increasingly severe transportation problems in urban areas throughout the nation and world. These phenomena can have wide-ranging consequences relating to safety, the economy, and the environment. Adverse weather conditions represent another significant challenge to safety and mobility on highways. Oregon is not immune from either of these global issues. Oregon Route (OR) 217, to the southwest of the downtown Portland, is one of the worst freeways for congestion in the state and is also subject to the Pacific Northwest's frequently inclement and unpredictable climate. High crash rates, severe recurrent bottlenecks and highly unreliable travel times continuously plague the corridor, making it a major headache for the thousands of commuters using it every day.
In an effort to more effectively combat both congestion and adverse weather, transportation officials all over the world have been turning to increasingly technological strategies like Active Traffic Management (ATM). This can come in many forms, but among the most common are variable speed limit (VSL) systems which use real-time data to compute and display appropriate reduced speeds during congestion and/or adverse weather. After numerous studies and deliberations, Oregon Department of Transportation (ODOT) selected Oregon Route (OR) 217 as one of the first locations in the state to be implemented with an advisory VSL system, and that system began operation in the summer of 2014. This thesis seeks to evaluate the effectiveness of this VSL system through the first eight months of its operation through an in-depth and wide-ranging "before and after" analysis.
Analysis of traffic flow and safety data for OR 217 from before the VSL system was implemented made clear some of the most prevalent issues which convinced ODOT to pursue VSL. Using those issues as a basis, a framework of seven specific evaluation questions relating to both performance and safety, as well as both congestion and adverse weather, was established to guide the "before and after" comparisons. Hypotheses, and measures of effectiveness for each question were developed, and data were obtained from a diverse array of sources including freeway detectors, ODOT's incident database, and the National Oceanic and Atmospheric Administration (NOAA).
The results of the various "before and after" comparisons performed as a part of this thesis indicate that conditions have changed on OR 217 in a number of ways since the VSL system was activated. Many, but not all, of the findings were consistent with the initial hypotheses and with the findings from other VSL studies in the literature. Certain locations along the corridor have seen significant declines in speed variability, supporting the common notion that VSL systems have a harmonizing effect on traffic flow. Crash rates have not decreased, but crashes have become less frequent in the immediate vicinity of VSL signs. Flow distribution between adjacent lanes has been more even since VSL implementation during midday hours and the evening peak, and travel time reliability has seen widespread improvement in three of the corridor's four primary travel lanes during those same times. The drops in flow that generally occur upstream of bottlenecks once they form have had diminished magnitudes, while the drops in flow downstream of the same bottlenecks have grown. Finally, the increase in travel times that is usually brought about by adverse weather has been smaller since VSL implementation, while the decline in travel time reliability has largely disappeared.
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Velaj, Xhilda. "New technology for road safety." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21885/.
Full text
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Gozick, Brandon. "A Driver, Vehicle and Road Safety System Using Smartphones." Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc115086/.
Full textAbstract:
As vehicle manufacturers continue to increase their emphasis on safety with advanced driver assistance systems (ADAS), I propose a ubiquitous device that is able to analyze and advise on safety conditions. Mobile smartphones are increasing in popularity among younger generations with an estimated 64% of 25-34 year olds already using one in their daily lives. with over 10 million car accidents reported in the United States each year, car manufacturers have shifted their focus of a passive approach (airbags) to more active by adding features associated with ADAS (lane departure warnings). However, vehicles manufactured with these sensors are not economically priced while older vehicles might only have passive safety features. Given its accessibility and portability, I target a mobile smartphone as a device to compliment ADAS that can bring a driver assist to any vehicle without regards for any on-vehicle communication system requirements. I use the 3-axis accelerometer of multiple Android based smartphone to record and analyze various safety factors which can influence a driver while operating a vehicle. These influences with respect to the driver, vehicle and road are lane change maneuvers, vehicular comfort and road conditions. Each factor could potentially be hazardous to the health of the driver, neighboring public, and automobile and is therefore analyzed thoroughly achieving 85.60% and 89.89% classification accuracy for identifying road anomalies and lane changes, respectively. Effective use of this data can educate a potentially dangerous driver on how to operate a vehicle safely and efficiently. with real time analysis and auditory alerts of these factors, I hope to increase a driver's overall awareness to maximize safety.
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Abuzwidah, Muamer Ali M. "Evaluation and modeling of the safety of open road tolling system." Master's thesis, University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4738.
Full textAbstract:
The goal of this thesis is to examine the traffic safety impact of upgrading Toll Plazas (TP) to Open Road Tolling (ORT). The ORT could enhance safety but could also pose some traffic safety concerns at Toll plazas. Crashes from eight years were investigated by evaluating the crash data before and after the implementation of the ORT. The study was conducted by using two approaches: 1) a simple before and after study and with a comparison group; 2) a modeling effort to help understand the relationship between the crash frequency and several important factors and circumstances such as injury severity, collision types, average daily traffic (ADT) and Toll plaza characteristics. The study investigated 11 Toll plazas on State Roads 408, 417, 528 and 429 that have been changed to the ORT design. Several maps showing the Toll plazas and identifying the relevant crash locations were generated. Negative Binomial (NB), Log Linear model and two-way contingency table were examined. Two log-linear models with three variables in each model with all possible two-way interactions were developed. Categorical data analysis of the 2009 and 2010 crash dataset was performed. In order to compare the differences in response between the crash frequency and a particular crash-related variable, odds ratios were computed. The effects of crash frequency and crash-related factors were examined, and interactions among them were considered. The results indicated significant relationships between the crash frequency and ADT, crash type and driver age. It is worth mentioning that the expressway network understudy was continuously experiencing constructions throughout the study period. There is indication that ORT reduced the total crash number; also there is indication of changing the crash types and locations; and the majority of crashes occurred at the diverging and merging areas and resulted in more severe crashes. More data may be needed to confirm these results especially after all constructions and upgrades are made. The Implementation of open road tolling, the locations of Toll plazas, Automatic Vehicle Identification (AVI) subscription rate, traffic demand, and plaza geometry all may have a high influence on traffic safety concerns at Toll plazas, as concluded from the negative Binomial Model's results. The changing of sign locations, reducing the speed limit, installing variable message signs, configuring plazas properly, and other considerations may be the solution to overcome the potential safety problems in the vicinity of Toll plazas. The change of design to ORT was proven to be an excellent solution to several traffic operation problems, including reducing congestion and improving traffic flow and capacity at Toll plazas. However, addressing safety concerns at Toll plazas should take priority.ID: 031001573; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Title from PDF title page (viewed August 26, 2013).; : .; Thesis (M.S.)--University of Central Florida, 2011.; Includes bibliographical references (p. 98-103).
M.S.
Masters
Civil, Environmental and Construction Engineering
Engineering and Computer Science
Civil Engineering; Transportation System Engineering Track
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Fryar, Colby, and Colby Fryar. "Ina Road landfill stormwater management system design." Thesis, The University of Arizona, 2006. http://hdl.handle.net/10150/626940.
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This report describes the design of the Ina Road Landfill Stormwater Management System. Such a system is required by the Arizona Department of Environmental Quality to efficiently and safely remove stormwater drainage from the landfill to better protect the environment and the public during storm events. Stormwater drainage systems are required at landfills to efficiently collect and remove stormwater, limit moisture that can penetrate waste, protect the integrity of the buried mass and the final cover system from washing out and reduce risk of flooding to neighboring property. The State requires that landfill stormwater management systems be designed to handle a minimum size storm event based on historical precipitation records.
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Adedokun, Adeyemi. "Application of Road Infrastructure Safety Assessment Methods at Intersections." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-127334.
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Traffic safety at intersections is a particularly difficult phenomenon to study, given the fact that accidents occur randomly in time and space thereby making short-term measurement, assessment and comparison difficult. The EU directive 2008/96/EC introduced road infrastructure safety management, which offers a five layer structure for developing safer road infrastructure has been used to develop tools for accident prediction and black spot management analysis which has been applied in this work to assess the safety level of intersections in Norrköping city in Sweden. Accident data history from STRADA (Swedish Traffic Accident Data Acquisition) and the network demand model for Norrköping city were used to model black spots and predict the expected number of accidents at intersections using PTV Visum Safety tool, after STRADA accident classification was restructured and the Swedish accident prediction model (APM) was configured and tested to work within the tool using the model from the Swedish road administration (SRA). The performance of the default (Swiss) and the Swedish APM was compared and identified locations with the high accident records, predicted accident counts and traffic volumes were audited using qualitative assessment checklist from Street-Audit tool. The results from these methods were analysed, validated and compared. This work provides recommendations on the used quantitative and qualitative methods to prevent accident occurrence at the identified locations.
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Hsu, Yueh-Ling. "Airline Safety Management: The development of a proactive safety mechanism model for the evolution of safety management system." Thesis, Cranfield University, 2004. http://dspace.lib.cranfield.ac.uk/handle/1826/4638.
Full textAbstract:
The systemic origins of many accidents have led to heightened interest in the way in
which organisations identify and manage risks within the airline industry. The
activities which are thought to represent the term "organisational accident", "safety
culture" and "proactive approach" are documented and seek to explain the fact that
airlines differ in their willingness and ability to conduct safety management. However,
an important but yet relatively undefined task in the airline industry is to
conceptualise the safety mechanism in proactive safety, and its influential factors.
What is required is a model of a proactive safety mechanism which builds upon
existing knowledge of what is thought to contribute to safety by adding an increased
knowledge of the organisational factors. These factors not only serve to influence the
safety mechanism, but also serve to be the predictors of the performance of safety
management system.
This thesis aims to fill that gap. It firstly conducts an overview of the current airline
safety management system literature and identifies the strengths and weaknesses of
the current system. Given the need to explore the important but undefined field, a
proactive safety mechanism model is then developed and tested to identify the
organisational factors which exert an influence upon the safety mechanism.
Four hypotheses were set out to be tested in an attempt to justify the
multi-dimensional and complex nature of the safety mechanism model. The model is
then tested by applying it to a past accident (case study) and a survey of opinions with
questionnaire. The results of this research work show that the safety mechanism
model is a model of the evolution of safety management system in the context of
proactive safety management. Further study can apply the proposed model to the
re-organisation of an airline safety management system and evaluate the impact upon
the company's system. It leads to the suggestion that an airline's safety health and
performance needs the co-ordination of both retroactive and proactive safety
management, and concludes that the ultimate contribution of this research is to
provide airlines with reliable data, applicable references and a practicable
methodology to enable their safety management system to evolve at a fundamentally
"genetic" level.
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Zhang, Dongming. "Study on Safety Improvement of Road Vehicle Subjected to Crosswind." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225569.
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Abugessaisa, Imad. "Analytical tools and information-sharing methods supporting road safety organizations." Doctoral thesis, Linköpings universitet, GIS - Geografiska informationssystem, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11596.
Full textAbstract:
A prerequisite for improving road safety are reliable and consistent sources of information about traffic and accidents, which will help assess the prevailing situation and give a good indication of their severity. In many countries there is under-reporting of road accidents, deaths and injuries, no collection of data at all, or low quality of information. Potential knowledge is hidden, due to the large accumulation of traffic and accident data. This limits the investigative tasks of road safety experts and thus decreases the utilization of databases. All these factors can have serious effects on the analysis of the road safety situation, as well as on the results of the analyses. This dissertation presents a three-tiered conceptual model to support the sharing of road safety–related information and a set of applications and analysis tools. The overall aim of the research is to build and maintain an information-sharing platform, and to construct mechanisms that can support road safety professionals and researchers in their efforts to prevent road accidents. GLOBESAFE is a platform for information sharing among road safety organizations in different countries developed during this research. Several approaches were used, First, requirement elicitation methods were used to identify the exact requirements of the platform. This helped in developing a conceptual model, a common vocabulary, a set of applications, and various access modes to the system. The implementation of the requirements was based on iterative prototyping. Usability methods were introduced to evaluate the users’ interaction satisfaction with the system and the various tools. Second, a system-thinking approach and a technology acceptance model were used in the study of the Swedish traffic data acquisition system. Finally, visual data mining methods were introduced as a novel approach to discovering hidden knowledge and relationships in road traffic and accident databases. The results from these studies have been reported in several scientific articles.
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Karlström, Zhang Wei. "Bus Rapid Transit System and Road Safety - International Best Pratices, Evaluation and Improvement." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-93536.
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With the fast developing economy, the motorised level is rapidly getting higher, especially in Asian countries. As a result of this, urban traffic has become a serious problem that is doing harm to our daily life. Bus Rapid Transit (BRT) system, as an effective solution, is being deployed worldwide. It combines the advantages of metro, light rail and also of conventional buses. BRT has big capacity, good service, and the most outstanding feature, high safety level for all road users. This thesis starts with nowadays traffic problems and points out that Bus Rapid Transit, as a new type of public transit, is an effective remedy that can improve urban traffic. Then it introduces Bus Rapid Transit system, and its practices from selected countries. Both evaluation and improvement are made for better systems in the end of the chapter. The main part focuses on Bus Rapid Transit system's safety level in terms of affecting other road users. Various systems with different bus lane layouts are discussed and some suggestions are made to improve road safety for different layouts. In the last part, the thesis is concluded, and future expectation is left for further researches.
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Yamaguchi, Shinichi S. M. Massachusetts Institute of Technology. "A system safety analysis of tomographic treatment." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113531.
Full textAbstract:
Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, System Design and Management Program, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references.
In recent years, the technology in the medical industry has been advancing to provide safe and systematic medical care. However, the system of medical technologies and treatments has become more complicated year by year, which increases the risks of defects in the system. For example, the U.S. Food and Drug Administration's Center for Devices and Radiologic Health has reported recalls of medical devices that may lead to serious injury or death because of malfunctions. To reduce the risks, developers and makers of medical devices have been applying a wide spectrum of methodologies to improve quality. However, the growing complexity of medical systems, including devices, medical staff, organizations, and regulators, causes problems that the current safety engineering techniques are inadequate to prevent, which can result in tragic medical accidents. Therefore, it is important to apply new approaches to ensure the system safety of medical devices. This thesis compares Failure Mode and Effect Analysis (FMEA) and System-Theoretic Process Analysis (STPA). STPA is one of the analysis techniques based on the systems-theoretic approach of system safety (STAMP) to identify what should be done to establish the design safety of medical systems. Presently, FMEA, as a risk management technique, is widely used as a major methodology to ensure the safety of medical devices; therefore, it is worth comparing with STPA as a fundamental methodology. This thesis identifies the basic design of tomographic treatment and applies STPA to the TomoTherapy system. This tomographic treatment system treats hard-to-reach tumors and reduces radiation exposure to nearby healthy tissues. To ensure the quality of TomoTherapy, STPA is an effective means to conduct hazard analyses because STPA holistically analyzes the safety of this system, considering both human and mechanical factors. After that, I compare the results of STPA and FMEA. STPA analysis found 99 unsafe control actions, 10 causal scenarios, and 29 possible requirements, in contrast with FMEA, which identified a total of 74 failure modes. The potential causes of failure in the results of FMEA include only human factors. However, STPA analyzes the system from various viewpoints, such as the physical system, human factors, organization, management, and so on. Thus, it can be seen that STPA can be used as a technique to identify potential causes as causal scenarios more comprehensively than FMEA.
by Shinichi Yamaguchi.
S.M. in Engineering and Management
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Åmansson, Peter. "SAFETY MANAGEMENT SYSTEM (SMS) FÖR FLYGUNDERHÅLL PART-145." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-32308.
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Denna litteraturstudie behandlar Safety Managment System (SMS), ett relativt nytt begrepp och arbetssätt inom flygindustrin för att arbeta med flygsäkerhet och som initierades av det som idag är International Civil Aviation Organization (ICAO), ett organ inom Förenta Nationen (FN). SMS utvecklades eftersom det i flygsäkerhetsarbetet har blivit allt svårare att utpeka enskilda faktorer som orsakar olyckor, utan är i större grad en kedja av faktorer när en olycka inträffat. SMS är en systematisk metod för att hantera säkerhet, inklusive de nödvändiga organisatoriska strukturer, ansvarsområden, riktlinjer och rutiner. SMS omfattar säkerhetspolicy och mål, riskhantering, säkerhetsförsäkran samt säkerhetsfrämjande. Transportstyrelsen publicerade 2013 ett svenskt State Safety Program (SSP) med krav på SMS inom andra verksamhetsområden inom flyget. European Aviation Safety Agency (EASA) publicerade 2013 ett förslag där SMS skulle krävas hos flygunderhållorganisationer (Part-145), vilket ej än har fastställts och publicerats. Syftet var att tydliggöra hur implementeringsarbetet fortgår för SMS inom svenska Part-145 organisationer, vilka faktorer som kan försvåra arbetet, samt att belysa möjligheter och utmaningar vid implementering av SMS. Även att få en förståelse i skillnaden mellan dagens säkerhetsarbete i förhållande till vid implementerat SMS inom flygunderhåll. Arbetet begränsades till SMS i Svenska flygindustrin och inom flygunderhåll Part-145 och arbetet baseras på källor från ICAO, EASA, Transportstyrelsen, relevant litteratur och forskning samt en kvalitativ intervju med representant på Transportstyrelsen. Slutsatsen är att det finns i dagsläget starka indicier på att EASA kommer att publicera ett lagförslag sommaren 2018 som gäller för underhålls-organisationer (Part-145) och att dessa organisationer då kommer att ha en tvåårsperiod för implementering. Vidare krav på rapportering, riskbedömning och tydligt krav på dokumentering är viktiga skillnader mellan dagens krav och de nya kraven i och med SMS. Vidare kan man konstatera att risken vid implementering av SMS är att man överkomplicerar implementeringen, inte anpassar systemet till egna organisationen, att rutiner sedan inte används alternativt otillräckligt med resurser eller att man efter implementering inte kontinuerligt arbetar med SMS. Vi kan även slå fast att framgångsfaktorer för att erhålla ett fungerande SMS inkluderar utbildning och engagerad ledning samt att SMS anpassas för organisationens verksamhet och blir väl integrerat i de dagliga aktiviteterna.This literature study covers the Safety Management System (SMS), a relatively new concept and working method within the aviation industry to work with flight safety and initiated by what is now the International Civil Aviation Organization (ICAO), a United Nation (UN) specialized agency. SMS was developed since work with flight safety has become increasingly difficult to identify individual factors that cause accidents, but to a greater extent a chain of factors when an accident occurred. SMS is a systematic approach to managing safety, including the necessary organizational structures, responsibilities, policies and procedures. SMS includes safety policy and objectives, risk management, safety assurance and safety promotion. The Swedish Transport Agency published in 2013 a Swedish State Safety Program (SSP) with requirements for SMS in other areas in aviation. European Aviation Safety Agency (EASA) published in 2013, a proposal with requirements of SMS to the maintenance organizations (Part-145), which has not yet been established and published. The objective was to clarify how the implementation work continues for SMS in Swedish Part-145 organizations, the factors that can complicate the work, as well as highlighting opportunities and challenges in the implementation of the SMS. Also to get an understanding of the difference between today's safety work in relation to the implemented SMS in aviation maintenance. The work was limited to SMS within Swedish aviation industry and maintenance Part-145 and the work is based on sources from ICAO, EASA, Swedish Transport Agency, relevant literature and research as well as a qualitative interview with a representative of the Swedish Transport Agency. The conclusion is that there is at today strong indications that EASA will publish a legislative proposal the summer of 2018, which applies to maintenance organizations (Part-145), and that these organizations will then have two years to implement the new requirements. Further reporting requirements, risk assessment and clear demands on documentation are important differences between today's requirements and the new requirements of the SMS. Furthermore, it can be stated that the risk in the implementation of SMS is that it complicates implementation more than needed, do not customize the system to their own organization, the routines then will not be use alternative insufficient resources, or that after the implementation the organization do not continuously work with the SMS. We can also conclude that the success factors to obtain effective SMS includes education and management commitment and that the SMS adapts to the organization's operations and is well integrated in the daily activities.
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Palm, Alexander, and Benjamin Gafvelin. "Ethical Hacking of Android Auto in the Context of Road Safety." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299647.
Full textAbstract:
With a more than ever increasing demand to interconnect smartphones with infotainment systems, Android Auto has risen in popularity with its services used in modern vehicles worldwide. However, as users progressively connect their smartphones to in-vehicle infotainment systems, the opportunity for malicious actors to endanger and access private data of Android Auto users advances as well. The goal with this thesis is to determine how secure Android Auto is for road use. The main research question is to figure out if Android Auto is susceptible to attacks that exploit certain vulnerabilities in the Android operating system. The research question was answered by creating several proof-of-concept attacks on Android Auto using an emulated infotainment system with mobile devices. An investigation was also conducted regarding the application’s communication channel between the mobile device and infotainment display. Results of this thesis demonstrate that several attacks are substantially severe to endanger drivers on the road. There is a great risk of successful exploits when running Android Auto locally on the phone without a connection to the infotainment system, and a lesser risk when connected to the infotainment system. Intercepting communication in the USB channel revealed an encryption algorithm whose version has published exploits and can be cracked to potentially exploit Android Auto.I takt med en evigt ökande efterfrågan på att sammankoppla smarttelefoner med infotainmentsystem, har allt fler börjat använda Android Auto i sina fordon världen över. En bieffekt av att allt fler sammankopplar sina mobiler till infotainmentsystem, är att det leder till fler möjligheter för illvilliga parter att stjäla privat data och sätta Android Autoanvändares liv i fara. Målet med denna avhandling är att fastställa hur säkert Android Auto är i avseende till vägsäkerhet. Den huvudsakliga forskningsfrågan är att lista ut om Android Auto kan attackeras av attacker som utnyttjar sårbarheter i Android operativsystemet. Forskningsfrågan besvarades genom att skapa flertal konceptattacker mot Android Auto användandes av ett emulerat infotainmentsystem och mobiltelefoner. En utredning utfördes även gällande applikationens kommunikationskanal mellan telefonen och infotainmentskärmen. Resultatet från denna avhandling demonstrerade att många attacker är tillräckligt allvarliga för att äventyra trafikanternas säkerhet. Det finns en avsevärd risk för framgångsrika attacker när Android Auto körs lokalt på telefonen utan en USB koppling till infotainmentsystemet, och en liten risk när telefonen är kopplad till infotainmentsystemet. Avlyssning och uppfångning av kommunikationen i USB kanalen visade att en krypteringsalgoritm vars version har existerande sårbarheter kan avkrypteras och utnyttjas för att potentiellt attackera Android Auto.
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Oktay, Gorkem. "Design And Simulation Of A Traction Control System For An Integrated Active Safety System For Road Vehicles." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/2/12610204/index.pdf.
Full textAbstract:
Active safety systems for road vehicles make a crucial preventive contribution to road safety. In recent years, technological developments and the increasing demand for road safety have resulted in the integration and cooperation of these individual active safety systems. Traction control system (TCS) is one of these individual systems, which is capable of inhibiting wheel-spin during acceleration of the vehicle on slippery surfaces.
In this thesis, design methodology and simulation results of a traction control system for four wheeled road vehicles are presented. The objective of the TCS controller is basically to improve directional stability, steer-ability and acceleration performance of vehicle by controlling the wheel slip during acceleration.
In this study, the designed traction control system based on fuzzy logic is composed of an engine torque controller and a slip controller. Reference wheel slip values were estimated from the longitudinal acceleration data of the vehicle. Engine torque controller determines the throttle opening angle corresponding to the desired wheel torque, which is determined by a slip controller to track the reference slip signals. The wheel torques delivered by the engine are compensated by brake torques according to the desired wheel torque determined by the slip controller. Performance of the TCS controller was analyzed through several simulations held in MATLAB/Simulink for different road conditions during straight line acceleration and combined acceleration and steering. For simulations, an 8 DOF nonlinear vehicle model with nonlinear tires and a 2 DOF nonlinear engine model were built.
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Sgueglia, John. "Managing design changes using safety-guided design for a safety critical automotive system." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/106224.
Full textAbstract:
Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, School of Engineering, System Design and Management Program, Engineering and Management Program, 2015.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 95-99).
The use of software to control automotive safety critical functions, such as throttle, braking and steering has been increasing. The automotive industry has a need for safety analysis methods and design processes to ensure these systems function safely. Many current recommendations still focus on traditional methods, which worked well for electro-mechanical designs but are not adequate for software intensive complex systems. System Theoretic Accident Model and Process (STAMP) and the associated System Theoretic Process Analysis (STPA) method have been found to identify hazards for complex systems and can be effective earlier in the design process than current automotive techniques. The design of a complex safety-critical system will require many decisions that can potentially impact the system's safety. A safety analysis should be performed on the new design to understand any potential safety issues. Methods that can help identify where and how the change impacts the analysis would be a useful tool for designers and managers. This could reduce the amount of time needed to evaluate changes and to ensure the safety goals of the system are met. This thesis demonstrates managing design changes for the safetyƯ-guided design of an automotive safetyƯ-critical shift-by-wire system. The current safety related analysis methods and standards common to the automotive industry and the system engineering methods and research in the use of requirements traceability for impact analysis in engineering change management was reviewed. A procedure was proposed to identify the impact of design changes to the safety analysis performed with STPA. Suggested guidelines were proposed to identify the impact of the change on the safety analysis performed with STPA. It was shown how the impact of the design changes were incorporated into the STPA results to ensure safety constraints are managed with respect to these changes to maintain the safety controls of the system throughout the design process. Finally the feasibility of the procedure was demonstrated through the integration of the procedure with requirements traceability based on system engineering practices
by John Sgueglia.
S.M. in Engineering and Management
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Beitelmal, Jamal A. "Development of appropriate technology road condition monitoring system." Thesis, University of Newcastle Upon Tyne, 1999. http://hdl.handle.net/10443/533.
Full textAbstract:
This dissertation is concerned with the principles of pavement management systems and their applications in western and developing countries. The first part of the dissertation deals with the principles of pavement engineering and the role of the different layers in order to gain the required knowledge in highway pavement components, which will allow a cost-effective repair related to each specific defect. The second part deals with the existing systems for monitoring pavement condition and evaluatest heir benefit in assessingh ighway condition. The study shows the main problems usually militate against using the sophisticated technology in monitoring highway condition and implementing maintenance management systems in some cities in developing countries. In addition to the problems inherent in cities in developing countries, the city of Benghazi in Libya has special factors which have developed as a result of UN sanctions which were imposed in 1992. Therefore, the city of Benghazi has been selected as a case study for this particular research since it is a typical example of most cities in developing countries in terms of size, population and in ten-ns of lack of maintenance resources and skilled labour (Benghazi might have been so well resourcedth at it would no longer fall into the categoryo f developingc ity but for the sanction). The objectives of the study are attained through conclusions which indicate that establishing a pavement maintenance strategy in the city of Benghazi based on any or some of the sophisticated technology in road condition monitoring is not appropriate. This conclusion is tested by manufacturing a unique prototype measuring machine and using it in pilot monitoring exercises in the cities of Newcastle and Sunderland. The results of these pilot exercises are analysed to evaluate the benefit which such appropriate technology equipment can bring to the issue of monitoring of pavement condition in cities in developing countries having problems similar to those that prevail in Benghazi. The prototype equipment developed in this study is unique in that it is purely mechanical and uses no electronics in monitoring road condition. Moreover, all parts of the machine are fabricated from materials available in most cities in developing countries and therefore such machines could be easily maintained locally. The prototype described in this study is not only relevant to road monitoring but points the way towards the development of similar equipment in many engineering situations in developing countries. This research study points engineers in similar conditions in the direction that the Author thinks they should follow in applying their engineering abilities in developing countries.
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Gozuyilmaz, Cem. "A System Approach To Occupational Health And Safety Management." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1095231/index.pdf.
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In this thesis, methods used at present in occupational health and safety management are analyzed and a model safety management system is developed. History, development and recent occupational safety regulations in the United States of America and European Union are introduced to give a sight on this subject in developed countries.
The suggested model is evaluated with work accident data taken from a company and hazard and risk analysis methods are used to investigate these accidents. Preventive measures to eliminate and reduce the consequences of these accidents are recommended. Finally a model safety management system which can be used in all types of industry is developed.
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Santos-Reyes, Jaime R. "The development of a fire safety management system model." Thesis, Heriot-Watt University, 2001. http://hdl.handle.net/10399/1140.
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Tedori, Veronica. "Design of a safety management information and tracking system." Master's thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-03302010-020341/.
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Li, Wai-chung Rachel. "Effectiveness of safety management system on Hong Kong construction industry under factories and industrial undertakings (safety management) regulation." Click to view the E-thesis via HKU Scholars Hub, 2006. http://lookup.lib.hku.hk/lookup/bib/B37938411.
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Jalew, Esubalew Alemneh. "Fog Computing based traffic Safety for Connected Vulnerable Road Users." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCK057/document.
Full textAbstract:
Chaque année, des millions de personnes meurent et beaucoup d'autres subissent des séquelles graves à la suite d'accidents de la route. Malgré une multitude d’initiatives, le nombre de cas mortels et d'accidents graves augmente chaque année en engendrant des problèmes préoccupants à la fois sociaux, économiques et sanitaires. En raison de leur nombre élevé et de l'absence de protection personnelle, plus de la moitié de ces décès concerne les usagers vulnérables (en anglais, vulnerable road users - VRU) regroupant les piétons, cyclistes et motocyclistes. Les appareils mobiles, combinés à la technologie de Fog Computing (ou informatique géodistribuée, ou même informatique en brouillard), représentent une solution réaliste à court terme pour les protéger en les avertissant de l’imminence d'un accident de circulation. L’omniprésence des appareils mobiles et leurs capacités de calcul élevées font de ces appareils un élément important à considérer dans les solutions de sécurité routière. Le Fog Computing offre des fonctionnalités adaptées aux applications de sécurité routière, puisqu’il s’agit d’une extension du Cloud Computing permettant de rapprocher les services informatiques, le stockage et le réseau au plus près des utilisateurs finaux. Par conséquent, dans cette thèse, nous proposons une architecture réseau sans infrastructure supplémentaire (PV-Alert) pour des fins de sécurité routière et reposant uniquement sur les appareils mobiles des VRU et des conducteurs sur la route avec l’aide du concept de Fog Computing. Les données géographiques et cinématiques de ces appareils sont collectées et envoyées périodiquement au serveur fog situé à proximité. Le serveur fog traite ces données en exécutant un algorithme de calcul de risque d’accident de circulation et renvoie des notifications en cas d'accident imminent. L’évaluation de cette architecture montre qu’elle est capable de générer des alertes en temps réel et qu’elle est plus performante que d’autres architectures en termes de fiabilité, d’évolutivité et de latenceAnnually, millions of people die and many more sustain non-fatal injuries because of road traffic crashes. Despite multitude of countermeasures, the number of causalities and disabilities owing to traffic accidents are increasing each year causing grinding social, economic, and health problems. Due to their high volume and lack of protective-shells, more than half of road traffic deaths are imputed to vulnerable road users (VRUs): pedestrians, cyclists and motorcyclists. Mobile devices combined with fog computing can provide feasible solutions to protect VRUs by predicting collusions and warning users of an imminent traffic accident. Mobile devices’ ubiquity and high computational capabilities make the devices an important components of traffic safety solutions. Fog computing has features that suits to traffic safety applications as it is an extension of cloud computing that brings down computing, storage, and network services to the proximity of end user. Therefore, in this thesis, we have proposed an infrastructure-less traffic safety architecture that depends on fog computing and mobile devices possessed by VRUs and drivers. The main duties of mobile devices are extracting their positions and other related data and sending cooperative awareness message to a nearby fog server using wireless connection. The fog server estimates collision using a collision prediction algorithm and sends an alert message, if an about-to-occur collision is predicted. Evaluation results shows that the proposed architecture is able to render alerts in real time. Moreover, analytical and performance evaluations depict that the architecture outperforms other related road safety architectures in terms of reliability, scalability and latency. However, before deploying the architecture, challenges pertaining to weaknesses of important ingredients of the architecture should be treated prudently. Position read by mobile devices are not accurate and do not meet maximum position sampling rates traffic safety applications demand. Moreover, continuous and high rate position sampling drains mobile devices battery quickly. From fog computing’s point of view, it confronts new privacy and security challenges in addition to those assumed from cloud computing. For aforementioned challenges, we have proposed new solutions: (i) In order to improve GPS accuracy, we have proposed an efficient and effective two-stage map matching algorithm. In the first stage, GPS readings obtained from smartphones are passed through Kalman filter to smooth outlier readings. In the second stage, the smoothed positions are mapped to road segments using online time warping algorithm. (ii) position sampling frequency requirement is fulfilled by an energy efficient location prediction system that fuses GPS and inertial sensors’ data. (iii) For energy efficiency, we proposed an energy efficient fuzzy logic-based adaptive beaconing rate management that ensures safety of VRUs. (iv) finally, privacy and security issues are addressed indirectly using trust management system. The two-way subjective logic-based trust management system enables fog clients to evaluate the trust level of fog servers before awarding the service and allows the servers to check out the trustworthiness of the service demanders. Engaging omnipresent mobile device and QoS-aware fog computing paradigm in active traffic safety applications has the potential to reduce overwhelming number of traffic accidents on VRUs
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Sahin, Murat. "Design And Simulation Of An Abs For An Integrated Active Safety System For Road Vehicles." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/2/12608801/index.pdf.
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Active safety systems for road vehicles have been improved considerably in recent years along with technological advances and the increasing demand for road safety. In the development route of active safety systems which started with introduction of digital controlled ABS in the late seventies, vehicle stability control systems have been developed which today, with an integration approach, incorporate ABS and other previously developed active safety technologies. ABS, as a main part of this new structure, still maintains its importance.
In this thesis, a design methodology of an antilock braking system controller for four wheeled road vehicles is presented with a detailed simulation work. In the study, it is intended to follow a flexible approach for integration with unified control structure of an integrated active safety system. The objective of the ABS controller, as in the previous designs in literature, is basically to provide retention of vehicle directional control capability and if possible shorter braking distances by controlling the wheel slip during braking. iv
A hierarchical structure was adopted for the ABS controller design. A high-level controller, through vehicle longitudinal acceleration based estimation, determines reference slip values and a low-level controller attempts to track these reference slip signals by modulating braking torques. Two control alternatives were offered for the design of the low-level controller: Fuzzy Logic Control and PID Control. Performance of the ABS controller was analyzed through extensive simulations conducted in MATLAB/Simulink for different road conditions and steering maneuvers. For simulations, an 8 DOF vehicle model was constructed with nonlinear tires.
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Chen, Yue. "A Novel Lightweight Lane Departure Warning System Based on Computer Vision for Improving Road Safety." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42125.
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With the rapid improvement of the Advanced Driver Assistant System (ADAS), autonomous driving has become one of the most common hot topics in recent years. While driving, many technologies related to autonomous driving choose to use the sensors installed on the vehicle to collect the information of road status and the environment outside. This aims to warn the driver to perceive the potential danger in the fastest time, which has become the focus of autonomous driving in recent years.
Although autonomous driving brings plenty of conveniences to people, the safety of it is still facing difficulties. During driving, even the experienced driver can not guarantee focus on the status of the road all the time. Thus, lane departure warning system (LDWS) becomes developed. The purpose of LDWS is to determine whether the vehicle is in the safe driving area. If the vehicle is out of this area, LDWS will detect it and alert the driver by the sensors, such as sound and vibration, in order to make the driver back to the safe driving area.
This thesis proposes a novel lightweight LDWS model LEHA, which divides the entire LDWS into three stages: image preprocessing, lane detection, and lane departure recognition. Different from the deep learning methods of LDWS, our LDWS model LEHA can achieve high accuracy and efficiency by relying only on simple hardware.
The image preprocessing stage aims to process the original road image to remove the noise which is irrelevant to the detection result. In this stage, we apply a novel algorithm of grayscale preprocessing to convert the road image to a grayscale image, which removes the color of it. Then, we design a binarization method to greatly extract the lane lines from the background. A newly-designed image smoothing is added to this stage to reduce most of the noise, which improves the accuracy of the following lane detection stage.
After obtaining the processed image, the lane detection stage is applied to detect and mark the lane lines. We use region of interest (ROI) to remove the irrelevant parts of the road image to reduce the detection time. After that, we introduce the Canny edge detection method, which aims to extract the edges of the lane lines. The last step of LDWS in the lane detection stage is a novel Hough transform method, the purpose of it is to detect the position of the lane and mark it.
Finally, the lane departure recognition stage is used to calculate the deviation distance between the vehicle and the centerline of the lane to determine whether the warning needs to turn on. In the last part of this paper, we present the experiment results which show the comparison results of different lane conditions. We do the statistic of the proposed LDWS accuracy in terms of detection and departure. The detection rate of our proposed LDWS is 98.2% and the departure rate of it is 99.1%. The average processing time of our proposed LDWS is 20.01 x 10⁻³s per image.
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Krishnaswami, Ram N. (Ram Narian). "Knowledge management practices in automotive safety attribute development." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35111.
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Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 2006.Includes bibliographical references (p. 100-102).
Organizations strive continuously to become efficient. Over the years many of them have tried to attain this through streamlining or reengineering their product development practices. 'While some of them succeed others are less successful. Product development organizations within automotive enterprises are not different in this regard. Most reengineering efforts seem to concentrate on tasks and schedule. Detailed schedules are cascaded while the identification of enablers on delivering to the new schedule is left to individual teams in the organization. At the working level, the reengineering process is misunderstood as abandonment of things gone right from past practices. This sometimes results in teams reinventing solutions to similar problems from the past. The purpose of this thesis is to demonstrate that a key enabler for success in any reengineering effort is to understand existing knowledge management practices and reuse them in the context of proposed changes. To do so, existing practices would have to be captured in usable formats. Proposed changes to existing product development process within an automotive product development organization are studied.
(cont.) Comparisons are made between existing and proposed product development process. To focus this comparison and understand the changes better, the development tasks undertaken by a safety attribute team within the product development group is studied in detail. An analysis of the development process undertaken by the safety team to existing schedule is performed through case studies. Based on this analysis scenarios are developed for the proposed changes. From the case studies it is apparent that formalized knowledge management practices in formats usable by development teams will help in reducing iteration time through cascade of robust targets. Recommendations are made to build upon and sustain recently implemented knowledge management practices within the safety attribute team. An implementation roadmap for the new knowledge management frame work is provided.
Ram N. Krishnaswami.
S.M.
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Robertson, Mike. "Examining the Relationship between Safety Management System Implementation and Safety Culture in Collegiate Flight Schools." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/dissertations/1380.
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Safety Management Systems (SMS) are becoming the industry standard for safety management throughout the aviation industry. As the Federal Aviation Administration (FAA) continues to mandate SMS for different segments, the assessment of an organization’s safety culture becomes more important. An SMS can facilitate the development of a strong aviation safety culture. This study describes basic principles and components of an SMS and how safety culture and SMS are integrated. Studies focusing on safety culture assessment were identified for other industries as well as for different areas of the aviation industry. The purpose of this study was to examine the relationship between an organization’s safety culture and SMS implementation in collegiate flight schools. The research study was designed to determine (a) relationship between SMS implementation and safety culture, (b) the relationship between safety promotion and safety culture, and (c) the relationship between management commitment and safety culture. The study population consisted of 453 individuals at 13 collegiate flight schools. Data were gathered through an online survey to safety officers at collegiate flight schools within the University Aviation Association to determine the level of SMS implementation; and the Collegiate Aviation Program Safety Culture Survey (CAPSCUS) was used to measure the safety culture at those collegiate flight schools. The results indicated that a relationship existed between SMS implementation and safety culture, safety promotion and safety culture, management commitment and safety culture. The relationship for all three was more prominent within the Formal Safety Program major scale of the CAPSCUS. It is recommended that collegiate flight schools examine their existing level of SMS, management commitment, and their safety promotion and assess safety culture within their institution. Future studies should be done to further examine the relationship between SMS implementation and safety culture so that the collegiate flight training environment would have guidance regarding SMS implementation.
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Tam, Yuen-chi, and 譚遠志. "The effectiveness of the safety management system on the MTR." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B4257514X.
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Tam, Yuen-chi. "The effectiveness of the safety management system on the MTR." Click to view the E-thesis via HKUTO, 2000. http://sunzi.lib.hku.hk/hkuto/record/B4257514X.
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Odajima, Ryo S. M. Massachusetts Institute of Technology. "Designing highly automated safety-critical railway system and its organization." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122433.
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Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, System Design and Management Program, 2019Cataloged from PDF version of thesis.
Includes bibliographical references (pages 269-277).
High-speed rail (HSR) has improved dramatically since its launch in 1964 in terms of its technical aspects such as speed and reliability, thanks to technical developments including the automation of the train operation. At the same time, safety has become an increasingly critical aspect as the severity of the accidents has become much more severe. Although the automation and newly developed software might have decreased the number of accidents that would not have been prevented without them, they also have introduced new types of hazards and accidents that did not exist before due to the increased level of complexity of the whole system. These hazards include system design errors, component interactions accidents, or software-related errors due to the increased number of interfaces and coordination among internal and external stakeholders and higher dependency on automation and software.
Thus eliminating component failures should not be the only design consideration or priority, and more consideration should be given to eliminating coordination or design errors that would not be solved by redundancy for the sake of reliability improvement. This thesis mainly focuses on analyzing the past accidents caused by systematic failures and provides recommendations and considerations for designing and operating highly automated complex safety-critical railway systems. Often, the accident analysis finishes once someone is found to be responsible, but this thesis focuses on figuring out why they behaved that way by using the STAMP framework, which is based on systems theory, documenting the systemic factors which contributed to the accidents. The analysis thus looks into not only physical systems but also organizational aspects, such as management, organization culture, and other social-technical aspects.
Two accident analyses revealed causal factors on every level of the organization, including policy makers, audit authority, management, human operators and engineers, physical systems, and so on. In addition, the analyses provide the conceptual explanation of how the systems migrate into an unsafe state over time. The set of knowledge learned through the analyses is summarized as 35 lessons learned. These lessons are of use for future considerations in designing highly-automated safety-critical railway systems and their organization.
by Ryo Odajima.
S.M. in Engineering and Management
S.M.inEngineeringandManagement Massachusetts Institute of Technology, System Design and Management Program
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Khan, Adnan 1968. "Systematic approach for safety development process." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/91734.
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Thesis (S.M.)--Massachusetts Institute of Technology, System Design & Management Program, February 2002."November 2001."
Includes bibliographical references (leaf 85).
by Adnan (Eddie) Khan.
S.M.
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Mattos, João Rodrigo Guerreiro. "Avaliação da aderência pneu-pavimento e tendências de desempenho para a rodovia BR-290/RS." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/30215.
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A aderência pneu-pavimento é um dos parâmetros mais importantes da segurança viária e deve ser avaliada em duas escalas: microtextura e macrotextura. As medidas de textura da superfície de pavimentos podem ser obtidas por diversos equipamentos, sendo que os mais difundidos são o Pêndulo Britânico e a Mancha de Areia. Dessa forma, esta pesquisa pretende utilizar esses dois equipamentos para verificar o comportamento da textura em função do tempo/tráfego para diferentes tipos de revestimentos. Para tanto, foram realizados levantamentos dos valores de micro e macrotextura em pavimentos da rodovia BR-290/RS, trecho Osório-Porto Alegre, com uma freqüência aproximadamente mensal durante um período inferior a um ano. Com base nos dados coletados, foi possível desenvolver tendências de desempenho da micro e macrotextura para pavimentos flexíveis e rígidos dessa rodovia. Os modelos propostos para a estimativa da textura podem ser usados como ferramentas auxiliares no Sistema de Gerência de Pavimentos (SGP), prevendo o momento oportuno para intervenções na superfície dos pavimentos de modo a garantir a segurança dos usuários. Após a análise dos resultados, constatou-se que, no geral, os pontos de monitoração da rodovia BR- 290/RS apresentam boas condições de aderência pneu-pavimento quando avaliados pelo International Friction Index (IFI), que é um índice representativo da combinação entre a macro e microtextura do pavimento. Além dos modelos para estimativa da textura, desenvolveu-se nesta pesquisa um modelo de correlação entre os resultados dos ensaios de Mancha de Areia e de Drenabilidade, possibilitando, assim, a estimativa do IFI através do valor da vazão de água na superfície do pavimento.Tire-road friction is one of the most important parameters regarding the safety of vehicles under slippery road conditions. Road surface texture is currently evaluated using several devices. In Brazil, the British Pendulum and the sand-patch method are most frequently used to measure microtexture and macrotexture, respectively. They were used in the research reported in this dissertation that aimed at verifying texture evolution with time/traffic on different types of pavement wearing courses. Thus, micro and macrotexture values were monthly measured in surveys carried out during one year in Brazilian Federal Road BR- 290/RS. Collected data allowed defining performance trends regarding micro and macrotexture of asphalt and Portland Cement Concrete (PCC) pavements. The models here proposed might be used as auxiliary tools in Pavement Management Systems (PMS) to estimate the time when a given rehabilitation action is necessary to assure vehicle and drivers safety. Results analysis showed that the surveyed pavements present adequate tire-road friction, when evaluated by the International Friction Index (IFI) which combines pavements macro and microtexture. In addition, a model relating results of the sand-patch method to drainability results is proposed. Such model allows the estimation of the IFI based on values of water inflow through the pavements wearing courses.
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Rösth, Marcus. "Hydraulic Power Steering System Design in Road Vehicles : Analysis, Testing and Enhanced Functionality." Doctoral thesis, Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8186.
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Demands for including more functions such as haptic guiding in power steering systems in road vehicles have increased with requirements on new active safety and comfort systems. Active safety systems, which have been proven to have a positive effect on overall vehicle safety, refer to systems that give the driver assistance in more and less critical situations to avoid accidents. Active safety features are going to play an increasingly important roll in future safety strategies; therefore, it is essential that sub systems in road vehicles, such as power steering systems, are adjusted to meet new demands. The traditional Hydraulic Power Assisted Steering, HPAS, system, cannot meet these new demands, due to the control unit's pure hydro-mechanical solution. The Active Pinion concept presented in this thesis is a novel concept for controlling the steering wheel torque in future active safety and comfort applications. The concept, which can be seen as a modular add-on added to a traditional HPAS system, introduces an additional degree of freedom to the control unit. Different control modes used to meet the demands of new functionality applications are presented and tested in a hardware-in-the-loop test rig. This thesis also covers various aspects of hydraulic power assisted steering systems in road vehicles. Power steering is viewed as a dynamic system and is investigated with linear and non-linear modeling techniques. The valve design in terms of area gradient is essential for the function of the HPAS system; therefore, a method involving optimization has been developed to determine the valve characteristic. The method uses static measurements as a base for calculation and optimization; the results are used in both linear and the non-linear models. With the help of the linear model, relevant transfer functions and the underlying control structure of the power steering system have been derived and analyzed. The non-linear model has been used in concept validation of the Active Pinion. Apart from concept validation and controller design of the active pinion, the models have been roven effective to explain dynamic phenomena related to HPAS systems, such as the chattering phenomena and hydraulic lag.The printed version and the electronic version differ in that the electronic version contains two built in video films (see page 78 and page 89).
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Supawiwat, Nutthapon. "A study on road slope management system considering maintenance and repair strategy." 京都大学 (Kyoto University), 2005. http://hdl.handle.net/2433/144540.
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Kyoto University (京都大学)0048
新制・課程博士
博士(工学)
甲第11867号
工博第2560号
新制||工||1358(附属図書館)
23647
UT51-2005-N701
京都大学大学院工学研究科土木システム工学専攻
(主査)教授 大西 有三, 教授 大津 宏康, 教授 中北 英一
学位規則第4条第1項該当
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Radtke, Stephen W. "An analysis of the XYZ/ABC Company's risk control management information system." Online version, 1999. http://www.uwstout.edu/lib/thesis/1999/1999radtkes.pdf.
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Gungor, Alper. "Occupational Health And Safety Management Tool." Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/3/12604694/index.pdf.
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Labor protection, that is prevention of occupational disease and reducing the frequency of accident, has always been a matter of major concern of mining industry. Management and the government should promote and maintain high safety standards through some measures and tools to reduce frequency of accidents and occupational diseases.
This thesis describes the development of a national occupational health and safety management tool that is composed of educational, statistical and database interfaces for mine safety and health administration.
The detailed analysis of an accident requires knowledge of many parameters such as location, time, type, cost of the accident, victim information, nature of injury, result of the accident etc. that can be obtained from a standard coded accident report form. So, database interface of the management tool is developed with this sense to realize collecting accident data in a nationally used format to produce a common safety reporting system.
Prepared database maintains user-friendly environment on Internet to submit accident information. Dynamic structure and ease of use of the developed database allow administered user to expand it without detailed computer programming knowledge. This was achieved by prepared modules to change or register new data fields within the database.
Created database is also secure since only gives data input access rights to registered users. Database administrator is able to create registered users. Registered users could be safety engineer or manager of a mine who is responsible from the submission of data to the ministry of labor. So, standard and secure accident data collected rapidly through Internet connection.
The other feature of the database is that, it is open to all people to query accidents with many aspects.
Prepared management tool also includes educational interface, content of which can also be enlarged, as the new ideas, information or solutions for accidents are improved. This information is also open to all people since educating workers and managers about accidents and prevention techniques can improve working conditions and increase awareness.
Knowing the fact that submitted accident data is still collected in hard copies in folders, the need for a kind of management tool, which is completed in this study, is obvious. Application of this kind of management tool will be able to prevent the collection of accident data in dusty shelves and share the accident data information with all people who are interested in with this subject.
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Boonsiripant, Saroch. "Speed profile variation as a surrogate measure of road safety based on GPS-equipped vehicle data." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28275.
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Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2009.Committee Chair: Hunter, Michael; Committee Member: Dixon, Karen; Committee Member: Guensler, Randall; Committee Member: Rodgers, Michael; Committee Member: Tsui, Kwok-Leung.
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Wang, Xiaoyang. "Aircraft fuel system prognostics and health management." Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7214.
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This thesis contains the specific description of Group Design Project (GDP) and
Individual Research Project (IRP) that are undertaken by the author and form
part of the degree of Master of Science.
The target of GDP is to develop a novel and unique commercial flying wing
aircraft titled FW-11. FW-11 is a three-year collaborative civil aircraft project
between Aviation Industry Corporation of China (AVIC) and Cranfield University.
According to the market analysis result conducted by the author, 250 seats
capacity and 7500 nautical miles were chosen as the design targets.
The IRP is the further study of GDP, which is to enhance the competitive
capability by deploying prognostics and health management (PHM) technology
to the fuel system of FW-11. As a novel and brand-new technology, PHM
enables the real-time transformation of system status data into alert and
maintenance information during all ground or flight operating phases to improve
the aircraft reliability and operating costs. Aircraft fuel system has a great
impact on flight safety. Therefore, the development of fuel system PHM concept
is necessary.
This thesis began with an investigation of PHM, then a safety and reliability
analysis of fuel system was conducted by using FHA, FMEA and FTA.
According to these analyses, fuel temperature diagnosis and prognosis were
chosen as a case study to improve the reliability and safety of FW-11. The PHM
architecture of fuel temperature had been established. A fuel temperature
prediction model was also introduced in this thesis.
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Renfrew, Donald Iain. "Software modelling of a QUENSH management system." Thesis, University of the West of Scotland, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327455.
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Forrest, Eleanor. "Development of a practical and measurable health and safety management system." Thesis, Connect to e-thesis, 2002. http://theses.gla.ac.uk/1062/.
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Thesis (Ph.D.) - University of Glasgow, 2002.Ph.D. thesis submitted to the Department of Naval Architecture and Marine Engineering, Universities of Glasgow and Strathclyde, 2002. Includes bibliographical references. Print version also available.
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Afghari, Amir Pooyan. "Incorporation of Road Safety into Road Management Systems." Thesis, 2012. http://spectrum.library.concordia.ca/974039/7/Afghari_MASc_S2012.pdf.
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Road collisions negatively affect the lives of hundreds of Canadians per year. Unfortunately, safety has been typically neglected from management systems. It is common to find that a great deal of effort has been devoted to develop and implement systems capable of achieving and sustaining good levels of condition. It is relatively recent that road safety has become an important objective. Managing a network of roads is not an easy task; it requires long, medium and short term plans to maintain, rehabilitate and upgrade aging assets, reduce and mitigate accident exposure, likelihood and severity. This thesis presents a basis for incorporating road safety into road management systems; two case studies were developed; one limited by available data and another from sufficient information. A long term analysis was used to allocate improvements for condition and safety of roads and bridges, at the network level. It was confirmed that a safety index could be used to obtain a first cut model; meanwhile potential for improvement which is a difference between observed and predicted number of accidents was capable of capturing the degree of safety of individual segments. It was found that the completeness of the system resulted in savings because of the economies obtained from trade-off optimization. It was observed that safety improvements were allocated at the beginning of the analysis in order to reduce the extent of issues, which translated into a systematic reduction of potential for improvement up to a point of near constant levels, which were hypothesized to relate to those unavoidable collisions from human error or vehicle failure.
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Chen, Wei-Wen, and 陳偉文. "Analysis of Motor Carriers’ Intention to Implement Road Traffic Safety Management System." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/t9wqdu.
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碩士國立交通大學
運輸與物流管理學系
106
Not only do traffic crashes bring about a wealth of agony and loss, but also they can put countries and societies in jeopardy. International Standard Organization (ISO) has developed ISO 39001 road traffic safety management system (RTSMS) to reduce fatalities and serious injuries due to traffic crashes since 2012. Although there are lots of compelling evidences which prove this safety management system can actually benefit countries, organizations and people, research seldom discusses the intention of implementing the system and the influencing factors. Hence, this study aims to develop an RTSMS ability scale to evaluate motor carriers’ abilities and to bridge the gap of RTSMS. Moreover, this study also constructs the relationships between intentions and influencing factors based on Theory of Planned Behavior (TPB). The study result manifests that abilities, attitude and subjective norms are positively and significantly correlated with intentions. In terms of safety management, motor carriers have the poorest performance on “Identify and correct the potential risk of all procedures”. Last but not least, the result shows that passenger carriers and carriers that pass other ISO certification have relatively higher intention and abilities to implement RTSMS. The study result can assist the government to make administrative policies of RTSMS.