Tesis: "Advanced traveler information systems"

1

Staszcuk, Joseph Henry. "Analyzing the use of portable advanced traveler information systems". Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/staszcuk/StaszcukJ1210.pdf.

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Advanced Traveler Information Systems (ATIS) have been employed over the past two decades to provide travelers with real-time traffic information; one example estimated downstream travel times. Portable ATIS, in the context of this study, can provide real-time traffic information-including advanced travel times, delay times, and reduced average speeds-to motorists by updating portable changeable message signs in rural settings. Currently, there are limited numbers of demonstrations of the capabilities of portable ATIS. This paper summarizes the results of a portable ATIS demonstration project in Redding, California. For the demonstration, four different portable ATISs were deployed on a construction project for a two-week period. These systems included Blufax, iCone, License Plate Reader (LPR) and Adaptir. Three aspects were tested: accuracy, reliability, and usability. Accuracy was evaluated by comparing measured travel times and speeds with a stopwatch measured baseline. Reliability was assessed by monitoring and summarizing the maintenance needs during the demonstration. System usability was addressed in terms of ease of setup and calibration. Overall, the systems accurately estimated travel times within 10 seconds 98 percent of the time for the LPR system and 100 percent of the time for the Blufax, and speeds were within 10 mph 99 percent of the time for the iCone and Adaptir systems. Each of the systems had their own unique challenges with reliability and usability. The results of this study show the promise of using portable systems to measure and display real-time travel times and highlight the challenges that need to be addressed for successful implementation. The study plan for follow up studies summarize the implementation of a future research study that will focus on remedying the downfalls found from the original demonstration project as well as focus on a human factors related experiment measuring vehicle headways with different changeable message sign sequences. These study plans were not implemented but are provided to guide future research work.

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2

Hu, Hyejung. "Measuring the Effectiveness of Advanced Traveler Information Systems (ATIS)". NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-12162008-001643/.

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The objective of this study was to develop valid methodologies for addressing several limitations of the current Advanced Traveler Information Systems (ATIS) evaluation tools. This study was focused mainly on three enhancements. First, the queue propagation algorithm of the selected tool (DYNASMART-P) was modified to more realistically model traffic congestion. The author proposed the addition of transfer flow capacity and backward gated flow constraints for more accurately calculating transfer flow rate. Second, the study modeled the natural diversion behaviors of drivers who do not receive traveler information. Lastly, statistical models of user responses to traveler information were developed using binary and multinomial logit methods to understand and model the relationship between driversâ socio-economic characteristics and their responses to traveler information. Among these three enhancements, the first two (improved queue propagation and natural diversion behavior algorithms) were implemented in the enhanced model. The user behavior models, however, were not implemented because their predictive power was not acceptable due to limitations in the data set. The enhanced model was applied to two case studies: 1) verifying the capabilities of the model under a recurring bottleneck scenario on I-40 corridor in the Triangle region of North Carolina, and 2) demonstrating the capability of the enhanced model to measure the effectiveness of U-Transportation (similar to the Vehicle Infrastructure Integration [VII] program in the USA) which has been under development in Korea. The first case study results showed that the improved queue propagation algorithm simulated the bottleneck queue much closer to the real data than the original model. The simulation results also indicated that the actual diversion rate under recurring congestion in the study network was very low. The results of the second case study demonstrated that the enhanced model can evaluate the network impact of new advanced technology in flooding situations and can evaluate the effect of market penetration of the communication technology.

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3

Sitabkhan, Murtaza Zoher 1971. "Quantitative evaluation of advanced traveler information system benefits". Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50017.

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4

Roell, Maria. "The use of public participation in the design of effective internet-based advanced traveler information systems". Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45954.

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This thesis examines three methods of public participation and their potential application to the design of internet-based Advanced Traveler Information Systems (ATISs). ATISs have the ability to reduce congestion by providing their users with real-time traffic information that can affect their travel decisions to avoid areas of high traffic. This study first uses a website evaluation method to determine a baseline of ATIS website quality. It then uses three forms of public participation, a survey, a future's workshop, and a feedback website to determine user preferences for Georgia's traveler information website, NaviGAtor. The results of the participation are then analyzed for their strengths and weaknesses and their applicability to ATIS development. The study concludes that the feedback website is the most applicable form of participation for ATIS design, followed by surveys that should be used periodically, and future's workshops that should be used rarely.

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5

Wong, Sau-ching Pauline. "Development of GIS-based advanced traveler information system (ATIS) in Hong Kong /". Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25247621.

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6

Belz, Nathan P. "Effectiveness of the Statewide Deployment and Integration of Advanced Traveler Information Systems". Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/BelzNP2008.pdf.

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7

黃秀貞 y Sau-ching Pauline Wong. "Development of GIS-based advanced traveler information system (ATIS) in Hong Kong". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31260962.

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8

Kim, Hoe Kyoung. "Development and evaluation of advanced traveler information system (ATIS) using vehicle-to-vehicle (V2V) communication system". Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33828.

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This research develops and evaluates an Advanced Traveler Information System (ATIS) model using a Vehicle-to-Vehicle (V2V) communication system (referred to as the GATIS-V2V model) with the off-the-shelf microscopic simulation model, VISSIM. The GATIS-V2V model is tested on notional small traffic networks (non-signalized and signalized) and a 6X6 typical urban grid network (signalized traffic network). The GATIS-V2V model consists of three key modules: vehicle communication, on-board travel time database management, and a Dynamic Route Guidance System (DRGS). In addition, the system performance has been enhanced by applying three complementary functions: Autonomous Automatic Incident Detection (AAID), a minimum sample size algorithm, and a simple driver behavior model. To select appropriate parameter ranges for the complementary functions a sensitivity analysis has been conducted. The GATIS-V2V performance has been investigated relative to three underlying system parameters: traffic flow, communication radio range, and penetration ratio of participating vehicles. Lastly, the enhanced GATIS-V2V model is compared with the centralized traffic information system. This research found that the enhanced GATIS-V2V model outperforms the basic model in terms of travel time savings and produces more consistent and robust system output under non-recurrent traffic states (i.e., traffic incident) in the simple traffic network. This research also identified that the traffic incident detection time and driver's route choice rule are the most crucial factors influencing the system performance. As expected, as traffic flow and penetration ratio increase, the system becomes more efficient, with non-participating vehicles also benefiting from the re-routing of participating vehicles. The communication radio ranges considered were found not to significantly influence system operations in the studied traffic network. Finally, it is found that the decentralized GATIS-V2V model has similar performance to the centralized model even under low flow, short radio range, and low penetration ratio cases. This implies that a dynamic infrastructure-based traffic information system could replace a fixed infrastructure-based traffic information system, allowing for considerable savings in fixed costs and ready expansion of the system off of the main network corridors.

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9

Nam, Doohee. "Econometric analysis of highway incident duration, public perceptions and information for advanced traveler information systems /". Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/10172.

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10

Iqbal, Md Shahadat. "Data Support of Advanced Traveler Information System Considering Connected Vehicle Technology". FIU Digital Commons, 2017. https://digitalcommons.fiu.edu/etd/3495.

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Traveler information systems play a significant role in most travelers’ daily trips. These systems assist travelers in choosing the best routes to reach their destinations and possibly select suitable departure times and modes for their trips. Connected Vehicle (CV) technologies are now in the pilot program stage. Vehicle-to-Infrastructure (V2I) communications will be an important source of data for traffic agencies. If this data is processed properly, then agencies will be able to better determine traffic conditions, allowing them to take proper countermeasures to remedy transportation system problems under different conditions. This research focuses on developing methods to assess the potential of utilizing CV data to support the traveler information system data collection process. The results from the assessment can be used to establish a timeline indicating when an agency can stop investing, at least partially, in traditional technologies, and instead rely on CV technologies for traveler information system support. This research utilizes real-world vehicle trajectory data collected under the Next Generation Simulation (NGSIM) program and simulation modeling to emulate the use of connected vehicle data to support the traveler information system. NGSIM datasets collected from an arterial segment and a freeway segment are used in this research. Microscopic simulation modeling is also used to generate required trajectory data, allowing further analysis, which is not possible using NGSIM data. The first step is to predict the market penetration of connected vehicles in future years. This estimated market penetration is then used for the evaluation of the effectiveness of CV-based data for travel time and volume estimation, which are two important inputs for the traveler information system. The travel times are estimated at different market penetrations of CV. The quality of the estimation is assessed by investigating the accuracy and reliability with different CV deployment scenarios. The quality of volume estimates is also assessed using the same data with different future scenarios of CV deployment and partial or no detector data. Such assessment supports the identification of a timeline indicating when CV data can be used to support the traveler information system.

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11

Bonsignore, Ruth M. (Ruth Marie). "A comparative evalation of the benefits of advanced traveler information systems (ATIS) operational tests". Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12305.

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12

Doshi, Siddharth. "Designing a multi-modal traveler information platform for urban transportation". Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37167.

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Urban transportation networks are inefficient due to sub-optimal use by travelers. One approach to counter the increase in urban transportation demand is to provide better information to travelers, which would allow them to make better use of the network. Existing traveler information systems do this to a certain extent, but are limited by the data available and the scope of their implementation. These systems are vertically integrated and closed so that using any external elements for analysis, user interfacing etc. is difficult. The effects of such traveler information systems are reviewed via a comparative analysis of case studies available in the literature. It is found that information availability has a definite positive effect, but the social and environmental benefits are difficult to quantify. It is also seen that combining data by integrating systems can lead to additional uses for the same data and result on better quality of service and information. In this thesis, a regional platform for multi-modal traveler information is proposed that would support the development of traveler information systems. The architecture incorporates a central processing and storage module, which acts as an information clearinghouse and supports receiving, managing and sending data to and from multiple sources and interfaces. This setup allows sharing of data for analysis or application development, but with access control. The components are loosely coupled to minimize inter-dependencies. Due to this, the source, analysis, user interface and storage components can be developed independently of each other. To better develop the requirements and understand the challenges of the proposed concept, a limited implementation of the system is designed for the midtown Atlanta region, incorporating multiple data sources and user interfaces. The individual elements of the system are described in detail as is the testing and evaluation of the system.

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13

Rizos, Anthony Charles. "Implementation of advanced transit traveler information systems in the United States and Canada : practice and prospects". Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59766.

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Thesis (M.C.P. and S.B. in Planning)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 2010.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 101-115).
Over the past few years, public transit agencies across the United States and Canada have increasingly implemented methods for passengers to access traveler information using new media and personal mobile communications devices. The most advanced examples of these devices, commonly known as "smartphones," combine telephone, Internet browsing, and personal digital assistant (PDA) functionality into a single, portable unit. Mobile data applications are literally exploding on the scene every day, and transit agencies are under tremendous social and political pressure to deploy more related information systems as rapidly as possible. These applications are popular with technology-savvy riders who enjoy easy and real-time access to information and updates about their transit routes and services of choice, anywhere they happen to be. A review of the literature, as well as interviews with managers at thirteen transit authorities across the spectrum of size and technical sophistication, provides a portrayal of the states of the practice and art, and paints a clear picture of the challenges facing implementation of these advanced systems in the field. The research confirms the initial hypothesis that while transit agencies are indeed devoting energy to pursuing advanced traveler information systems, the approaches to implementing them could be improved. Based on the findings, I recommend that transit agencies: conduct necessary market research; develop more explicit and comprehensive traveler information system strategies; clarify the role and business case for social media; secure sufficient financial and technology resources; ensure sufficient operating as well as capital funding; eliminate constraints on use of data from commercial software; and, adopt and embrace open-source software development using an "open government" model.
by Anthony Charles Rizos.
M.C.P.and S.B.in Planning

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14

Blanco, Myra. "Effects of In-Vehicle Information Systems (IVIS) Tasks on the Information Processing Demands of a Commercial Vehicle Operations (CVO) Driver". Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/36413.

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This study was performed with two main goals in mind. The first goal was to understand and predict "red-lines" and "yellow-lines" in terms of what the CVO driver can process without hindering the primary task of driving. The second goal was to collect conventional secondary task data for CVO driving performance. An on-the-road experiment was performed with the help of 12 truck drivers. Type of task, presentation format, information density, and age were the independent variables used in the experiment. The 22 dependent measures collected were grouped into the following categories: eye glance measures, longitudinal driving performance, lateral driving performance, secondary task performance, and subjective assessment. The findings of this study strongly suggest that paragraphs should not be used under any circumstance to present information to the driver while the vehicle is in motion. On the other hand, the Graphics with Icons represent the most appropriate format in which driving instructions and information should be presented for IVIS/CVO tasks. In order to avoid a high visual attention demand to the driver due to a secondary task, only simple search tasks with the most important information shall be presented. Although the suggested format, type of task, and information density represent a higher visual attention demand than a conventional secondary task, these characteristics seem to bind a task with a moderate attentional demand. Other combinations of format, type of task, and information density will cause an increase in the driver's attentional demand that will consequently deteriorate their driving performance causing unsafe driving situations.
Master of Science

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15

Xiao, Yan. "Hybrid Approaches to Estimating Freeway Travel Times Using Point Traffic Detector Data". FIU Digital Commons, 2011. http://digitalcommons.fiu.edu/etd/356.

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The accurate and reliable estimation of travel time based on point detector data is needed to support Intelligent Transportation System (ITS) applications. It has been found that the quality of travel time estimation is a function of the method used in the estimation and varies for different traffic conditions. In this study, two hybrid on-line travel time estimation models, and their corresponding off-line methods, were developed to achieve better estimation performance under various traffic conditions, including recurrent congestion and incidents. The first model combines the Mid-Point method, which is a speed-based method, with a traffic flow-based method. The second model integrates two speed-based methods: the Mid-Point method and the Minimum Speed method. In both models, the switch between travel time estimation methods is based on the congestion level and queue status automatically identified by clustering analysis. During incident conditions with rapidly changing queue lengths, shock wave analysis-based refinements are applied for on-line estimation to capture the fast queue propagation and recovery. Travel time estimates obtained from existing speed-based methods, traffic flow-based methods, and the models developed were tested using both simulation and real-world data. The results indicate that all tested methods performed at an acceptable level during periods of low congestion. However, their performances vary with an increase in congestion. Comparisons with other estimation methods also show that the developed hybrid models perform well in all cases. Further comparisons between the on-line and off-line travel time estimation methods reveal that off-line methods perform significantly better only during fast-changing congested conditions, such as during incidents. The impacts of major influential factors on the performance of travel time estimation, including data preprocessing procedures, detector errors, detector spacing, frequency of travel time updates to traveler information devices, travel time link length, and posted travel time range, were investigated in this study. The results show that these factors have more significant impacts on the estimation accuracy and reliability under congested conditions than during uncongested conditions. For the incident conditions, the estimation quality improves with the use of a short rolling period for data smoothing, more accurate detector data, and frequent travel time updates.

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16

Murashige, Yoshiyasu. "Drivers' evaluation of advanced traveller information systems for inter-city expressways in Japan". Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36615.

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17

Agafonov, Evgeny. "Fuzzy and multi-resolution data processing for advanced traffic and travel information". Thesis, Nottingham Trent University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271790.

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18

Sugawara, Yoshihiko. "Understanding the differences in the development and use of advanced traveler information systems for vehicles (ATIS/V) in the U.S., Germany, and Japan". Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40377.

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Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2007.
Includes bibliographical references (p. 143-157).
Traffic congestion is becoming a serious problem. As a solution, advanced traveler information systems (ATIS) mitigate traffic congestion by providing real-time traffic information to travelers. ATIS includes various applications such as radio traffic reporting services and websites. Among those, this thesis focuses on more advanced real-time traffic information systems, which provide sophisticated traffic information to drivers via in-vehicle devices such as car navigation systems: we call them ATISN (advanced traveler information systems for vehicles). ATISN has a high potential to mitigate traffic congestion and improve travel for individual drivers. However, in some countries, ATISN has not been accepted well by drivers. To improve this situation, three questions motivate this study: (1) why does ATISN in some parts of the world have more penetration than in others, (2) what can be done to increase the penetration of ATISN, and (3) what kinds of strategic alliances among stakeholders can help to make better ATISNs. This thesis compares three countries, the U.S., Germany, and Japan, by a qualitative analysis of the system dynamics methodology to clarify reasons which have been causing differences in the penetration.
(cont.) Additionally, a new supply chain model based on McQueen's model is used. Furthermore, stakeholder analysis and case studies regarding stakeholder alliances in current ATISNs and highway service operators' strategies for alliances are conducted. In conclusion, from a macro-perspective analysis, many prominent factors in the dynamics of ATISN penetration are found, such as public investment in a public-driven ATISN, the in-vehicle device market, and two-way communication technology development. Furthermore, from analysis for alliances among stakeholders, no absolute best alliances but many possibilities to create alliances for ATISN are clarified, and the use of ATISN as a differentiation tool is suggested as one option worth considering.
b y Yoshihiko Sugawara.
S.M.

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19

Ahmed, Afzal. "Integration of real-time traffic state estimation and dynamic traffic assignment with applications to advanced traveller information systems". Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/9420/.

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Accurate depiction of existing traffic states is essential to devise effective real-time traffic management strategies using Intelligent Transportation Systems (ITS). Existing applications of Dynamic Traffic Assignment (DTA) methods are mainly based on either the prediction from macroscopic traffic flow models or measurements from the sensors and do not take advantage of traffic state estimation techniques, which produce estimate of the traffic states with less uncertainty than the prediction or measurement alone. On the other hand, research studies highlighting estimation of real-time traffic state are focused only on traffic state estimation and have not utilized the estimated traffic state for DTA applications. This research introduces a framework which integrates real-time traffic state estimate with applications of DTA to optimize network performance during uncertain traffic conditions through traveller information system. The estimate of real-time traffic states is obtained by combining the prediction of traffic density using Cell Transmission Model (CTM) and the measurements from the traffic sensors in Extended Kalman Filter (EKF) recursive algorithm. The estimated traffic state is used for predicting travel times on available routes in a traffic network and the predicted travel times are communicated to the commuters by a variable message sign (VMS). In numerical experiments, the proposed estimation and information framework is applied to optimize network performance during traffic incident on a two route network. The proposed framework significantly improved the network performance and commuters’ travel time when compared with no-information scenario during the incident. The application of the formulated methodology is extended to model day-to-day dynamics of traffic flow and route choice with time-varying traffic demand. The day-to-day network performance is improved by providing accurate and reliable traveller information. The implementation of the proposed framework through numerical experiments shows a significant improvement in daily travel times and stability in day-to-day performance of the network when compared with no-information scenario. The use of model based real-time traffic state estimation in DTA models allows modelling and estimating behaviour parameters in DTA models which improves the accuracy of the modelling process. In this research, a framework is proposed to model commuters’ level of trust in the information provided which defines the weight given to the information by commuters while they update their perception about expected travel time. A methodology is formulated to model and estimate logit parameter for perception variation among commuters for expected travel time based on measurements from traffic sensors and estimated traffic state. The application of the proposed framework to a test network shows that the model accurately estimated the value of logit parameter when started with a different initial value of the parameter.

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20

Wang, Jinghui. "Multi-modal Energy Consumption Modeling and Eco-routing System Development". Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/78624.

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A door-to-door trip may involve multiple traffic modes. For example, travelers may drive to a subway station and make a transfer to rail transit; alternatively, people may also start their trips by walking/cycling to a bus/subway station and then take transit in most of the trip. A successful eco-route planning thus should be able to cover multiple traffic modes and offer intermodal routing suggestions. Developing such a system requires to address extensive concerns. The dissertation is a building block of the multi-modal energy-efficient routing system which is being developed and tested in the simulation environment before real applications. Four submodules have been developed in the dissertation as partial fulfillment of the simulation-based system: energy consumption modeling, subway system development, on-road vehicles dynamic eco-routing, and information effect on route choice behavior. Other submodules such as pedestrian/bicycle modeling will be studied in the future. Towards the research goal, the dissertation first develops fuel consumption models for on-road vehicles. Given that gasoline light duty vehicles (LDVs) and electric vehicles were modeled in previous studies, the research effort mainly focuses on heavy duty vehicles (HDVs). Specifically, heavy duty diesel trucks (HDDTs) as well as diesel and hybrid-electric transit buses are modeled. The models are developed based on the Virginia Tech Comprehensive Power-based Fuel consumption Modeling (VT-CPFM) framework. The results demonstrate that the model estimates are highly consistent with field observations as well as the estimates of the Comprehensive Modal Emissions Model (CMEM) and MOtor Vehicle Emissions Simulator (MOVES). It is also found that the optimum fuel economy cruise speed ranges between 32 and 52 km/h for the tested trucks and between 39 and 47 km/h for the tested buses on grades varying from 0% to 8%, which is significantly lower than LDVs (60-80 km/h). The dissertation then models electric train dynamics and energy consumption in support of subway simulation system development and trip energy estimation. The dynamics model varies throttle and brake level with running speed rather than assuming constants as was done by previous studies, and the energy consumption model considers instantaneous energy regeneration. Both models can be easily calibrated using non-engine data and implemented in simulation systems and eco-transit applications. The results of the dynamics modeling demonstrate that the proposed model can adequately capture instantaneous acceleration/deceleration behavior and thus produce realistic train trajectories. The results of the energy consumption modeling demonstrate that the model produces the estimates consistent with the National Transit Database (NTD) results, and is applicable for project-level analysis given its ability in capturing the energy consumption differences associated with train, route and operational characteristics. The most suitable simulation testbed for system development is then identified. The dissertation investigates four state-of-the-art microsimulation models (INTEGRATION, VISSIM, AIMSUM, PARAMICS). Given that the car-following model within a micro-simulator controls longitudinal vehicle motion and thus determines the resulting vehicle trajectories, the research effort mainly focuses on the performance of the built-in car-following models from the energy and environmental perspective. The vehicle specific power (VSP) distributions resulting from each of the car-following models are compared to the field observations. The results demonstrate that the Rakha-Pasumarthy-Adjerid (RPA) model (implemented in the INTEGRATION software) outperforms the Gipps (AIMSUM), Fritzsche (PARAMICS) and Wiedemann (VISSIM) models in generating accurate VSP distributions and fuel consumption and emission estimates. This demonstrates the advantage of the INTEGRATION model over the other three simulation models for energy and environmental analysis. A new eco-routing model, comprehensively considering microscopic characteristics, is then developed, followed by a numerical experiment to test the benefit of the model. With the resulting eco-routing model, an on-road vehicle dynamic eco-routing system is constructed for in-vehicle navigation applications, and tested for different congestion levels. The results of the study demonstrate that the proposed eco-routing model is able to generate reasonable routing suggestions based on real-time information while at the same time differentiate eco-routes between vehicle models. It is also found that the proposed dynamic eco-routing system achieves lower network-wide energy consumption levels compared to the traditional eco-routing and travel time routing at all congestion levels. The results also demonstrate that the conventional fuel savings relative to the travel time routing decrease with the increasing congestion level; however, the electric power savings do not monotonically vary with congestion level. Furthermore, the energy savings relative to the traditional eco-routing are also not monotonically related to congestion level. In addition, network configuration is demonstrated to significantly affect eco-routing benefits. The dissertation finally investigates the potential to influence driver behavior by studying the impact of information on route choice behavior based on a real world experiment. The results of the experiment demonstrate that the effectiveness of information in routing rationality depends upon the traveler's age, preferences, route characteristics, and information type. Specifically, information effect is less evident for elder travelers. Also, the provided information may not be contributing if travelers value other considerations or one route significantly outperforms the others. The results also demonstrate that, when travelers have limited experiences, strict information is more effective than variability information, and that the faster less reliable route is more attractive than the slower more reliable route; yet the difference becomes insignificant with experiences accumulation. The results of the study will be used to enhance system design through considering route choice incentives.
Ph. D.

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21

Henclewood, Dwayne Anthony. "Real-time estimation of arterial performance measures using a data-driven microscopic traffic simulation technique". Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44792.

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Traffic congestion is a one hundred billion dollar problem in the US. The cost of congestion has been trending upward over the last few decades, but has experienced slight decreases in recent years partly due to the impact of congestion reduction strategies. The impact of these strategies is however largely experienced on freeways and not arterials. This discrepancy in impact is partially linked to the lack of real-time, arterial traffic information. Toward this end, this research effort seeks to address the lack of arterial traffic information. To address this dearth of information, this effort developed a methodology to provide accurate estimates of arterial performance measures to transportation facility managers and travelers in real-time. This methodology employs transmitted point sensor data to drive an online, microscopic traffic simulation model. The feasibility of this methodology was examined through a series of experiments that were built upon the successes of the previous, while addressing the necessary limitations. The results from each experiment were encouraging. They successfully demonstrated the method's likely feasibility, and the accuracy with which field estimates of performance measures may be obtained. In addition, the method's results support the viability of a "real-world" implementation of the method. An advanced calibration process was also developed as a means of improving the method's accuracy. This process will in turn serve to inform future calibration efforts as the need for more robust and accurate traffic simulation models are needed. The success of this method provides a template for real-time traffic simulation modeling which is capable of adequately addressing the lack of available arterial traffic information. In providing such information, it is hoped that transportation facility managers and travelers will make more informed decisions regarding more efficient management and usage of the nation's transportation network.

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22

Struwig, Claudia Bernadine. "A stepwise approach towards achieving a multimodal platform within the context of the CoCT’s land transport networks". Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80001.

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Thesis (MScEng)--Stellenbosch University, 2013.
ENGLISH ABSTRACT: The importance of transport should not be underestimated. Transport progresses a person’s quality of life: it connects people to one another and provides access to work, services and recreational opportunities. However, post-apartheid South Africa is unfortunately still faced with a legacy of segregation. While the less-privileged, who mostly live at the fringe of Central Business Districts (CBDs), are captive users of public transport, the private vehicle trend, under the privileged, is becoming more evident. This research project thus proposes that a balanced and integrated sustainable transport system be promoted. That is, one that will aid South Africa in growing and improving its general socio-economical status by providing all its citizens with (equal) access to a balanced transport network. It is believed that, if a multimodal system is promoted, the deficiencies of the current heterogeneous non-integrated systems may be overcome. Therefore, if South Africa’s transport network is augmented with a multimodal platform, the nation will be able to move its citizens effectively and efficiently, without jeopardising the economy, social matters and the environment, today and in the future. Moreover, South Africa will also have the necessary stimulus to utilise the already available resources at its disposal by working together as ‘one’. This research project thus stipulates a (generic) sequential approach needed in achieving an integrated (sustainable) public transport system. The goal of this research project is to create awareness of the benefits that may arise from, and the implementation steps required in obtaining, such a multimodal platform. The focus area for researching the proposition made herein is the City of Cape Town’s (CoCT’s) land transport networks. The City has a management facility, with resultant transport data repository, known as the Transport Management Centre (TMC). This TMC is regarded as one of the finest state of the art facilities in the world and the features thereof offer a sufficient base and point of departure for the promotion of a multimodal transport system. By conducting research in this field, the following portraying aspects, needed for the realisation of the proposition made herein, were found. Firstly, in order to obtain an integrated sustainable transport system, the appropriate Intelligent Transport Systems (ITS) need to be integrated. It is believed that, if an intelligent transport scheme, grounded on ITS applications, is advocated, the City will be in the position to more effectively monitor what is going on, to more accurately predict what might happen in the future, and to manage its transport system proactively on an area-wide basis. Secondly, in order to meet the integration requirements imposed by multimodal transport, a centralised database needs to be created. With such a database in place, information sharing across all modes of private- and public land transport, and thus also between the investors or the operators, will be possible. An example of such a database was developed in Microsoft Access and the modes considered therein are: MyCiti, Metrorail and Golden Arrow Bus Service (GABS). The data stored in this database is historic, but the incorporation of real time information was also catered for. Thirdly, it is believed that the success of the City’s transport system, and the development of a multimodal system, is dependent on the provision of an efficient Advanced Traveller Information System (ATIS). The idea is to promote multimodal transport as a convenient transit option by providing travellers with information on journey planning that aims to counteract their reluctance to change. In order to develop such a multimodal Journey Planner (JP), the unimodal networks considered herein were combined into a supernetwork on which Dijkstra’s Shortest Path Algorithm was applied. This algorithm was programmed in Microsoft Excel’s Visual Basic for Applications (VBA) and it incorporates the following user criteria: the origin, the destination, the user’s mode preference, and the user’s optimisation preference of either time or distance. In conclusion, it can be argued that, with information becoming such a vital commodity in everyday life, the catering for informed travellers are the key to successful future transport services. If travellers are informed about the transport networks’ performance, a positive attitude is fostered. Moreover, by providing travellers with information on journey planning, their feelings of uncertainty and fear of the unknown, that are present in (especially) public transport services, may be neutralised. This information will give the public carte blanche to make decisions that give them the perception of having more ‘control over their lives’. Therefore, if a multimodal JP that can be accessed from one portal is created, people’s inclination to acquire more information will be met. And as a result, traversing in an integrated manner may become the norm.
AFRIKAANSE OPSOMMING: Die belangrikheid van vervoer mag nie onderskat word nie. Vervoer speel ’n belangrike rol in die bevordering van ’n persoon se lewenskwaliteit: dit verbind mense met mekaar en verskaf toegang tot die werksplek, diensteverskaffers, en vryetydsbesteding. Post-apartheid Suid-Afrika is egter nog steeds vasgevang in ’n nalatenskap van rasseskeiding. Die minderbevoorregtes, wat meestal aan die buitewyke van die stad woon, is geforseerde gebruikers van openbare vervoer, terwyl die neiging (onder die bevoorregtes) om privaatvoertuie te gebruik, aan die toeneem is. Hierdie navorsingsprojek beveel dus aan dat ’n gebalanseerde, geïntegreerde en volhoubare vervoerstelsel bevorder moet word. ’n Sodanige stelsel sal help om die sosio-ekonomiese status van Suid-Afrika te bevorder. Dít kan net bereik word as alle landsburgers gelyke toegang tot ’n gebalanseeerde vervoernetwerk het. As ’n multimode-stelsel dus bevorder word, kan die tekortkominge van die huidige heterogene, nie-geïntegreerde stelsels oorkom word. Indien Suid-Afrika se vervoernetwerk ’n multimodale platform het, kan die landsburgers effektief en doeltreffend vervoer word sonder om die ekonomie, sosiale aangeleenthede of omgewing, tans en in die toekoms, in gedrang in te bring. Suid-Afrika sal boonop, met so ’n platform in plek, ook die nodige stimulus hê om die bestaande hulpbronne optimaal te gebruik. Hierdie navorsingsprojek verskaf ’n (generiese) in-volgorde-benadering om ’n volhoubare, geïntegreerde openbare vervoerstelsel daar te stel. Die doel is om bewustheid van die voordele wat uit ’n multimodale platform spruit, sowel as die nodige stappe vir die uitvoering daarvan, te kweek. Die fokusarea van die navorsing is die Stad van Kaapstad se land-vervoernetwerke. Die Stad het ’n beheerfasiliteit waar vervoerdata versamel word. Dit staan bekend as die vervoer-beheersentrum (TMC: Transport Management Centre). Hierdie fasiliteit word as toonaangewend in die wêreld beskou. Die kenmerkende eienskappe van hierdie fasiliteit bied verder ook ’n goeie vertrekpunt vir die bevordering van ’n multimodale stelsel. Die navorsing in hierdie veld het die volgende bydraende faktore, wat benodig word om die voorstelling te realiseer, geïdentifiseer. In die eerste plek moet die intelligente vervoerstelsels (ITS: Intelligent Transport Systems) geïntegreer word om ’n geïntegreerde volhoubare vervoerstelsel daar te stel. Indien ’n intelligente vervoerskema, gebaseer op tegnologiese inisiatiewe, aangemoedig word, sal die Stad van Kaapstad in die posisie wees om sy vervoerstelsel pro-aktief te bestuur deur meer effektief te monitor wat aangaan en meer akkuraat te voorspel wat in die toekoms mag gebeur. Tweedens moet daar ’n gesentraliseerde databasis geskep word. Met hierdie databasis sal die nodige integrasievereistes vir ’n multimodale vervoerstelsel, bereik word. Inligting kan dan gedeel word tussen privaat- en openbare landvervoer, asook tussen die beleggers en die operateurs van die verskillende vervoermodusse. ’n Voorbeeld van so ’n databasis is in Microsoft Access geskep en die modusse wat deel daarvan uitmaak, is: MyCiti, Metrorail en Golden Arrow Bus Services (GABS). Die data wat hierin vervat is, is histories, maar daar is vir intydse inligting voorsiening gemaak. In die derde plek is die sukses van die Stad van Kaapstad se vervoerstelsel en die ontwikkeling van ’n multimodale stelsel afhanklik van die daarstelling van ’n effektiewe, gevorderde inligtingsstelsel vir pendelaars (ATIS: Advanced Traveller Information Systems). Die idee is om ’n multimodale vervoerstelsel as ’n gerieflike opsie onder pendelaars te bevorder. Dit kan bereik word deur inligting rakende reisbeplanning aan pendelaars daar te stel. Met die verkryging van sodanige kennis sal die pendelaar se weerstand teen verandering ook afneem. Om so ’n multimodale reisbeplanner (JP: Journey Planner) te ontwikkel, is die eenmodaal-netwerke gekombineer om ’n supernetwerk te skep. Dijkstra se algoritme is op die supernetwerk toegepas. Die algoritme is in Microsoft Excel se VBA (Visual Basic for Applications) geprogrammeer en dit bevat die volgende gebruikerskriteria, nl. die begin- en eindpunt, die gebruiker se modes-voorkeur en die gebruiker se gekose optimeringsvoorkeur van tyd of afstand. Ten slotte kan gesê word dat inligting ’n groot rol in die mens se daaglikse lewe en aktiwiteite speel. Daar kan dus geredeneer word dat die sleutel tot suksesvolle vervoerdienste daarin lê om vir ingeligte pendelaars voorsiening te maak. As pendelaars ingelig is oor die stand van die vervoernetwerk maak dit hul houding meer positief. Verder, as pendelaars ook inligting oor reisbeplanning het, kan dit hul gevoel van onsekerheid en vrees jeens (veral) openbare vervoer teenwerk. Met al hierdie inligting tot sy beskikking kan ’n persoon dus sy eie keuses maak en dit lei daartoe dat die persoon meer in beheer voel. As ’n multimodale JP geskep word, voed dit die mens se begeerte vir meer inligting. En met ’n sodanige JP in plek, kan geïntegreerde pendel moontlik die norm word.

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23

Florian, Daniel George. "Simulation-based evaluation of Advanced Traveler Information Services (ATIS)". Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32271.

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Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2004.
Includes bibliographical references (p. 113-115).
Drivers using information from an Advanced Traveler Information System (ATIS) could potentially make better travel decisions to reduce travel time and increase trip reliability, thereby benefiting both guided drivers as well as those without such access. However, market penetration of ATIS can have dramatic effects on the performance of the transportation system in terms of overall benefits conferred as well as the distributional effects between guided and unguided drivers. Because market penetration will be determined both by private market structure and public policies, the effective deployment of ATIS depends critically on the private and public organizations that will provide these services. An understanding of the relationship between transportation system performance and ATIS market penetration provides important insights into a sustaining market structure for the ATIS industry. This thesis provides an empirical study of the impact of ATIS on transportation network quality of service using an application of DynaMIT (Dynamic network assignment for the Management of Information to Travelers). An analysis of the simulation results serves to inform the public and private stakeholder positions in the creation of a better market for ATIS. The main results are that the provision of dynamic route guidance can simultaneously benefit the individual performance of drivers, both guided and unguided, as well as the system performance of existing transportation infrastructure. In order to perform this analysis, it was necessary to develop a new software framework for the real- time integration of DynaMIT and a Traffic Management Center (TMC).
by Daniel George Florian.
S.M.

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24

Walker, Joan Leslie. "Modeling traveler response to traveler information systems : laboratory simulation of information searches using multimedia technology". Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11665.

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Henderson, Jeffrey. "A Planning Model for Optimizing Locations of Changeable Message Signs". Thesis, University of Waterloo, 2004. http://hdl.handle.net/10012/856.

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Changeable Message Signs (CMS) are commonly utilized by transportation agencies to inform motorists of traffic, roadway, and environmental conditions. They may be used to provide information, such as delay and alternate route guidance, in the event of an incident, construction or a roadway closure. The effectiveness of CMS in managing freeway traffic, however, is a function of many factors including the number of CMS installations, the location of CMS, the messages displayed, varied traffic network characteristics, and drivers' response to incident conditions and CMS information. The objective of this thesis is to develop a CMS location planning model that can be used by transportation agencies to develop a CMS location plan that could achieve the largest long-term benefit to the system. This research is mainly motivated by the lack of systematic, robust and practical methods for locating CMS. State-of-practice methods rely mostly on the practitioner's experience and judgement. Other methods fail to incorporate reasonable driver behaviour models, consider time-varying demand, allow for computational efficiency on large networks, or consider the spatial variation of incidents on a traffic network. A new CMS location optimization model has been developed that is unique in both model realism and computational efficiency. The model incorporates several components to estimate incident delay, predict driver response, estimate network-wide benefit, and choose those CMS locations that would provide the most benefit. Deterministic queuing methods are used in conjunction with historic incident characteristics to approximate the delay impact of an incident with and without CMS. A discrete choice model is used to predict the rate at which drivers would switch from the incident route to a less congested alternative under CMS information. A network traffic assignment model is then incorporated in an attempt to estimate the resulting traffic induced by incidents. Genetic algorithms are utilized as an optimization technique to choose a set of CMS that would provide the most benefit. An extensive computational analysis was performed on both a hypothetical network and a segment of Highway 401 through Toronto. A sensitivity analysis was performed to test the model's response to parameter and data estimation errors. The model was found to be most sensitive to the diversion model parameters. The model produced reasonable results with locations selected upstream of major freeway interchange diversion points. Considering the additional components included in the proposed model, and its ability to consider more location schemes, the proposed model may be considered superior to previous CMS location models.

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26

Ahmed, Mohamed. "Multi-Level Safety Performance Functions for High Speed Facilities". Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5091.

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High speed facilities are considered the backbone of any successful transportation system; Interstates, freeways, and expressways carry the majority of daily trips on the transportation network. Although these types of roads are relatively considered the safest among other types of roads, they still experience many crashes, many of which are severe, which not only affect human lives but also can have tremendous economical and social impacts. These facts signify the necessity of enhancing the safety of these high speed facilities to ensure better and efficient operation. Safety problems could be assessed through several approaches that can help in mitigating the crash risk on long and short term basis. Therefore, the main focus of the research in this dissertation is to provide a framework of risk assessment to promote safety and enhance mobility on freeways and expressways. Multi-level Safety Performance Functions (SPFs) were developed at the aggregate level using historical crash data and the corresponding exposure and risk factors to identify and rank sites with promise (hot-spots). Additionally, SPFs were developed at the disaggregate level utilizing real-time weather data collected from meteorological stations located at the freeway section as well as traffic flow parameters collected from different detection systems such as Automatic Vehicle Identification (AVI) and Remote Traffic Microwave Sensors (RTMS). These disaggregate SPFs can identify real-time risks due to turbulent traffic conditions and their interactions with other risk factors. In this study, two main datasets were obtained from two different regions. Those datasets comprise historical crash data, roadway geometrical characteristics, aggregate weather and traffic parameters as well as real-time weather and traffic data. At the aggregate level, Bayesian hierarchical models with spatial and random effects were compared to Poisson models to examine the safety effects of roadway geometrics on crash occurrence along freeway sections that feature mountainous terrain and adverse weather. At the disaggregate level; a main framework of a proactive safety management system using traffic data collected from AVI and RTMS, real-time weather and geometrical characteristics was provided. Different statistical techniques were implemented. These techniques ranged from classical frequentist classification approaches to explain the relationship between an event (crash) occurring at a given time and a set of risk factors in real time to other more advanced models. Bayesian statistics with updating approach to update beliefs about the behavior of the parameter with prior knowledge in order to achieve more reliable estimation was implemented. Also a relatively recent and promising Machine Learning technique (Stochastic Gradient Boosting) was utilized to calibrate several models utilizing different datasets collected from mixed detection systems as well as real-time meteorological stations. The results from this study suggest that both levels of analyses are important, the aggregate level helps in providing good understanding of different safety problems, and developing policies and countermeasures to reduce the number of crashes in total. At the disaggregate level, real-time safety functions help toward more proactive traffic management system that will not only enhance the performance of the high speed facilities and the whole traffic network but also provide safer mobility for people and goods. In general, the proposed multi-level analyses are useful in providing roadway authorities with detailed information on where countermeasures must be implemented and when resources should be devoted. The study also proves that traffic data collected from different detection systems could be a useful asset that should be utilized appropriately not only to alleviate traffic congestion but also to mitigate increased safety risks. The overall proposed framework can maximize the benefit of the existing archived data for freeway authorities as well as for road users.
ID: 031988164; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (Ph.D.)--University of Central Florida, 2012.; Includes bibliographical references.
Ph.D.
Doctorate
Civil, Environmental, and Construction Engineering
Engineering and Computer Science
Civil Engineering

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27

Dugarry, Alexandre. "Advanced driver assistance systems information management and presentation". Thesis, Cranfield University, 2004. http://hdl.handle.net/1826/833.

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With the development of advanced driving assistance systems, in-vehicle communication and information systems, there are situations where the driver becomes overloaded by information, creating potentially dangerous conditions. In this Thesis a novel strategy is proposed, to prioritise and present information. Firstly two main criteria are extracted, that allow the ability to rank messages: the risk associated with the non-presentation of the message, and its relevance to the environment. Fuzzy cognitive maps enable to represent expert knowledge and model these relationships. Secondly, a strategy to present information is proposed. Using an importance index, calculated from the previous risk and relevance indices, but also information nature, time constraints and access frequency, a set of best interfaces is selected. Furthermore design a model of driver workload is designed, based on the multiple resources theory. By estimating in real time the workload of the driver, the system enables to choose an optimal interface, that should prevent overload. This Thesis presents then the tools developed for the implementation and testing of the model. A video capture and data transfer program, based on the IEEE-1394 bus, enable in-vehicle real-time data capture and collection. Moreover, a software package for replay of the acquired data, analysis and simulation is developed. Finally, the implementation of the prioritisation and presentation strategy is outlined. The last part of this work is dedicated to the experiments and results. Using an experimental vehicle, data in different driving conditions are collected. the experiment is completed by creating data to simulate potentially dangerous situations, where driver is overloaded with information. The results show that the information management and presentation system is able to prevent overload in most conditions. Its structure and design allow to incorporate expert knowledge to refine the classification.

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28

Polydoropoulou, Amalia. "Modeling user response to advanced travlers information systems (ATIS)". Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10364.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
Includes bibliographical references (leaves 247-258).
by Amalia Polydoropoulou.
Ph.D.

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29

Zhang, Mingchuan. "Advanced spatial information processes: modeling and application". Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/76087.

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Making full use of spatial information is an important problem in information-processing and decision making. In this dissertation, two Bayesian decision theoretic frameworks for context classification are developed which make full use of spatial information. The first framework is a new multispectral image context classification technique which is based on a recursive algorithm for optimal estimation of the state of a two-dimensional discrete Markov Random Field (MRF). The implementation of the recursive algorithm is a form of dynamic programming. The second framework is based on a stochastic relaxation algorithm and Markov-Gibbs Random Fields. The relaxation algorithm constitutes an optimization using annealing. We also discuss how to estimate the Markov Random Field Model parameters, which is a key problem in using MRF in image processing and pattern recognition. The estimation of transition probabilities in a 2-D MRF is converted into two 1-D estimation problems. Then a Space-varying estimation method for transition probabilities is discussed.
Ph. D.

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30

Newman, William Arthur. "Risk/threat based analysis auditing in advanced management information systems". Thesis, University of Canterbury. Accounting and Information Systems, 1986. http://hdl.handle.net/10092/3761.

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This dissertation discusses the growth of auditing and internal control and evaluates the present degree of knowledge and the current and future roles of auditors in a computer-based environment. An analysis of the current state of computer-based auditing is presented along with current research in audit and security methodologies is presented and critiqued. The concept of System Metrics is formulated and defined and a computer-audit analysis system called the Risk Evaluation Model (REM) is created, described and utilized. The Risk Evaluation Model is an interactive set of programs written in FORTRAN which assesses Information Systems for a variety of attributes to judge the "quality" of a system. Currently the system assesses: 1. Portability of the System; 2. Maintainability of the System; 3. Complexity of the System; 4. Known threats to the System and known Features neutralizing those threats; 5. The General System Security Level; and 6. The Hardware Reliability of the System. The model is currently implemented on the Prime 750 computer.

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31

López-Gutiérrez, Diego [Verfasser]. "Interoperable Architectures for Advanced Health Information Systems / Diego López-Gutiérrez". Aachen : Shaker, 2010. http://d-nb.info/1124363971/34.

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Dakela, Sibongiseni. "Web analytics strategy: a model for adopting and implementing advanced Web Analytics". Doctoral thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/10288.

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Includes bibliographical references (leaves 290-306).
Web Analytics (WA) is an evaluative technique originating from and driven by business in its need to get more value out of understanding the usage of its Web sites and strategies therein. It is the measurement, collection, analysis and reporting of Internet data for the purposes of understanding and optimising Web usage for the online visitor, the online customer and the business with Web site presence. Current WA practice is criticised because it involves mostly raw statistics and therefore the practice tends to be inconsistent and misleading. Using grounded action research, personal observations and a review of online references, the study reviews the current state of WA to to propose an appropriate model and guidelines for a Web Analytics adoption and implementation in an electronic commerce organisation dealing with online marketing.

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33

Hoydis, Jakob. "Random matrix theory for advanced communication systems". Phd thesis, Supélec, 2012. http://tel.archives-ouvertes.fr/tel-00765458.

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Advanced mobile communication systems are characterized by a dense deployment of different types of wireless access points. Since these systems are primarily limited by interference, multiple-input multiple-output (MIMO) techniques as well as coordinated transmission and detection schemes are necessary to mitigate this limitation. Thus, mobile communication systems become more complex which requires that also the mathematical tools for their theoretical analysis must evolve. These must be able to take the most important system characteristics into account, such as fading, path loss, and interference. The aim of this thesis is to develop such tools based on large random matrix theory and to demonstrate their usefulness with the help of several practical applications, such as the performance analysis of network MIMO and large-scale MIMO systems, the design of low-complexity polynomial expansion detectors, and the study of random beamforming techniques as well as multi-hop relay and double-scattering channels. The methods developed in this work provide deterministic approximations of the system performance which become arbitrarily tight in the large system regime with an unlimited number of transmitting and receiving devices. This leads in many cases to simple and close approximations of the finite-size system performance and allows one to draw relevant conclusions about the most significant parameters. One can think of these methods as a way to provide a deterministic abstraction of the physical layer which substantially reduces the system complexity. Due to this complexity reduction, it is possible to carry out a system optimization which would be otherwise intractable.

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34

Winning, Herbert Keith. "Application and development of advanced engineering geographical information systems for pipeline design". Thesis, Coventry University, 2015. http://curve.coventry.ac.uk/open/items/4e581e2a-9d09-4b76-ace2-d76d22354719/1.

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This thesis proposes the use of an Advanced Engineering Geographical Information System (AEGIS) for the improved design of onshore pipelines, from concept to operation. The system is novel in that it is function rather than discipline or software specific. The thesis statement has been developed, and an aim and set of research objectives identified (along with the success criteria for the evaluation of the system), based on a review of current pipeline design methods. Drawing on a design science research methodology (DSRM), the thesis proposes the development of the system as an artefact in order to validate the proposed constructs, models, methods and implementations. The thesis discusses the underlying issues of data interoperability, the application of open data standards, and the integration of computer aided design (CAD) and geographical information systems (GIS). These challenges are addressed in the thesis and demonstrated through the implementation of the system. To support the development of the system, research was undertaken in the fields of pipeline engineering, environmental engineering and engineering design. As part of this research, a number of peer-reviewed journal papers were published, and conference papers presented in Kampala, Houston, London and Split. These papers covered the key fields contained in the thesis including, fluid mechanics, bio-systems engineering, environmental engineering, CAD/GIS integration (CGI), and the application and development of geospatial pipeline data models. The thesis concludes that the approach is valid, offering significant improvement across all fields compared to the current method of pipeline design. By taking a functional approach to the challenges of the design of pipelines, a system has been developed that addresses the requirements of the pipeline engineer, environmental engineer and engineering designer. The system enables the user to select the software of their choice, thereby reducing the problems associated with data interoperability, retraining and system integration. The sharing of data and outputs from analysis carried out within the system, provides an integrated approach, which can subsequently be used for the integrity management of the pipeline during the operational phase of the project. The scope for further development of this approach to pipeline design is also discussed. In addition to the inclusion of further engineering and environmental analysis, there is the potential for using the system for the design of subsea pipelines.

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35

Lansdown, Terry C. "Visual demand and the introduction of advanced driver information systems into road vehicles". Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/7438.

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This thesis contains six studies investigating the impact of advanced in-vehicle information systems on the visual demands of the driver. The experiments, while self-contained were conceived to relate together in a cohesive manner. The first study investigated the reliability of visual behaviour assessment. Video tape records from experimental trials were analysed post-hoc. Significant test/retest correlations were obtained. Experiment two considered the visual demands of the driving task without intervention from new technologies. Results from road trials using an instrumented vehicle suggested changes in the subject's visual scanning which could be related to the roadway environment (i.e., rural, urban and motorway driving). In experiment three the effects of the introduction of a driver information system were assessed using a congestion warning device on public roads. System use resulted in significantly greater: subjective mental workload, glance duration and frequency, and percentage time (eyes) away from the forward view; than the in-car entertainment system, or the control (normal driving). Experiment four replicated experiment three in a fixed base driving simulator. It aimed to establish the value of the simulator for the assessment of driver visual demand. The same significant differences presented in the road trial were observed in the simulation study. In the penultimate study, opportunities for the reduction of driver visual demand were investigated. The subjects were presented with: visual, auditory or visual and auditory route guidance information. Results suggest use of auditory information to supplement visual displays significantly reduces visual demand on the driver. The final study considered the effect of information availability on the distribution of visual scanning. Driver control of in-vehicle information presentation enabled self-determination of visual scanning strategies. Information system control of information presentation was found to disrupt the driver's visual checking. The interface design was shown to force the driver to adopt different visual scanning strategies. The contribution of the experimental work to the assessment of driver visual demand is discussed and the relationships between the experiments explored.

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36

Ward, Gerald Lee. "Electronic Warrant Systems: The Effect of Advanced Technologies on Arrest Performance". ScholarWorks, 2016. https://scholarworks.waldenu.edu/dissertations/2703.

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Public safety is negatively affected when arrest warrant information is not available to law enforcement officers, judges, prosecutors, and other criminal justice practitioners. The U.S. Government and the criminal justice community have advocated for electronic warrant systems (e-warrants). Peace officers know that when e-warrant systems deliver warrant information to them immediately from multiple jurisdictions, their safety is increased. However, the factors that cause these e-warrants systems to improve safety are not known. The purpose of this historical data analysis study was to determine if the use of e-warrant systems resulted in shorter clearance times than the use of legacy paper-based systems. Stakeholder theory, open systems theory, and service-oriented architecture theory were used to guide the quantitative research design. This study compared 2 years of historical arrest warrants from 6 sheriffs' departments organized into population matched sets. Two-way ANOVA tests and nonparametric tests were conducted to analyze the impact of the independent variables warrant system type and case type on the dependent variables mean service days and percent warrants served. The study showed that operating e-warrant systems in similar size sample agencies did not ensure shorter mean service days and higher percent warrants served over legacy systems, and it confirmed that more research is needed to determine other factors that will lead to an improvement in these variables. The findings of this study may assist agency executives and justice practitioners to identify other variables that may increase effectiveness of e-warrant systems, thereby improving public and officer safety, both important social benefits.

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37

Löfås, Peter. "Advanced Traffic Service". Thesis, Linköping University, Department of Computer and Information Science, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-374.

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More and more travellers use navigation-aid software to find the way while driving. Most of todays systems use static maps with little or no information at all about currently yeilding roads conditions and disturbances in the network. It is desirable for such services

in the future to include information about road works, accidents, surface conditions and other types of events that affects what route is currently the best.

It is also desirable to notify users about changes in the prerequisites of the chosen route after they have started their trip.

This thesis investigates methods to include dynamic traffic information in route calculations and notifying users when the characteristics change for their chosen route.

The thesis utilizes dynamic traffic information from The Swedish Road Agencys (Vägverket) central database for traffic information, TRISS and calculates affected clients with help of positioning through the GSM network.

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38

Özbay, Kaan. "A dynamic traffic simulation/assignment model in the context of Advanced Driver Information Systems /". This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10222009-125053/.

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39

Ozbay, Kaan. "A dynamic traffic simulation/assignment model in the context of Advanced Driver Information Systems". Thesis, Virginia Tech, 1991. http://hdl.handle.net/10919/45254.

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Growing congestion problems of many metropolitan areas which cause excessive traffic delay, instability of travel time generated the need for the development of an Intelligent Vehicle Highway System (IVHS) program that is capable of making significant improvements in mobility, highway safety, and productivity on highways and urban streets. The success of such real time control system highly depends on the new methods that address dynamic traffic assignment. Thus there is an urgent need for an effective dynamic assignment model. The main objective of this research is to emphasize the importance of dynamic traffic assignment for Advanced Driver Information Systems (ADIS) which is one of the major components of IVHS and to present a practical traffic assignment model that is capable of running in real time and which can accurately predict link travel times, queue build up, and network performance. DYNTRAS (DYNamic Traffic Simulation Assignment), a simulation /assignment model is developed. The model uses an incremental loop that assigns a portion of the Origin-Destination matrix, and simulates the movement of the vehicles. Then, it updates travel times and assigns an additional portion of the O-D matrix. In contrast to traditional traffic assignment models like "capacity restraint" and “incremental assignment" techniques that do not consider time dimension, DYNTRAS incorporates time as a third dimension by keeping track of the vehicle movements in time. As a result, it is capable of predicting time-dynamic impacts of congestion and effects of diverted traffic on traffic flow more realistically. The model is applied to a test network. “Several experimental factors are varied to test the sensitivity of the model. The results obtained are presented and general conclusions are derived. The differences between dynamic and static traffic assignment results are also discussed by considering results obtained from both methods. The model needs to be calibrated using real traffic data. According to the results obtained, it needs to be validated. In addition, its long computation time should be reduced to be able to use it for real time applications.
Master of Science

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40

NOCKA, THEODHORA. "AUTOMATED TRANSIT TRIP PLANNING SYSTEM IN SOUTHERN CALIFORNIA AND ITS APPLICATION IN THE GREATER CINCINNATI AREA". University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin994693516.

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41

Luo, Jia Le. "Integration of knowledge management and enterprise resource planning for advanced production management". Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2493690.

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42

Eriksson, Viktor. "Evaluation of Decentralized Information Matrix Fusion for Advanced Driver-Assistance Systems in Heavy-Duty Vehicles". Thesis, KTH, Optimeringslära och systemteori, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-191993.

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Advanced driver-assistance systems (ADAS) is one of the fastest growing areas of automotive electronics and are becoming increasingly important for heavy-duty vehicles. ADAS aims to give the driver the option of handing over all driving decisions and driving tasks to the vehicle, allowing the vehicle to make fully automatic maneuvers. In order to perform such maneuvers target tracking of surrounding traffic is important in order to know where other objects are. Target tracking is the art of fusing data from different sensors into one final value with the goal to create an as accurate as possible estimate of the reality. Two decentralized information matrix fusion algorithms and a weighted least-squares fusion algorithm for target tracking have been evaluated on two simulated overtaking maneuvers performed by a single target. The first algorithm is the optimal decentralized algorithm (ODA), which is an optimal IMF filter, the second algorithm is the decentralized-minimum-information algorithm (DMIA), which approximates the error covariance of received estimates, and the third algorithm is the naïve algorithm (NA), which uses weighted-least-squares estimation for data fusion. In addition, DMIA and NA are evaluated using real sensor data from a test vehicle. The results are generated from 100 Monte Carlo runs of the simulations. The error of position and velocity as well as the their corresponding root-mean-squared-error (RMSE) are smallest for ODA followed by NA and DMIA. ODA gives consistent estimators for the first simulated overtaking but not the second. DMIA and NA are not statistically significant on a 95 % level. The robustness against sensor failures shows that ODA is robust and yields similar results to the simulations without sensor failures. DMIA and NA are sensitive to sensor failures and yield unstable results. ODA is clearly the best option to use for sensor fusion in target tracking.
Avancerade förarsystem (ADAS) är en av de snabbast växande områdena inom fordonselektronik och blir mer och mer viktigt även för lastbilar. ADAS riktar sig till att ge föraren möjligheten att låta fordonet ta beslut om köningen och utföra autonoma manövrar. För att kunna utföra sådana manövrar krävs objektföljning av omkringvarande fordon. Sensorfusion inom objektföljning är tekniken att kombinera data från olika sensorer till ett värde med målet att skapa en så precis skattning av verkligheten som möjligt. Två decentraliserade informationsmatris-fusions algoritmer och en viktad minsta- kvadrat fusions algoritm för objektskattning har blivit utvärderade utifrån två simulerade omkörningar utförda av ett enskilt objekt. Den första algoritmen är optimal decentralized algorithm (ODA), som är ett optimalt informationsmatris-fusions fil- ter, den andra algoritmen är decentralized-minimum-information algorithm (DMIA), som approximerar kovariansmatrisen av residualerna från mottagna skattningar, samt den tredje algoritmen är naïve algorithm (NA), som kombinerar data från sensorerna med hjälp av viktad minsta-kvadrat fusion. Utöver detta är DMIA och NA även utvärderade på riktig sensordata från ett testfordon. Resultaten är genererade från 100 Monte Carlo körningar av simuleringarna. Residualerna för position och hastighet samt minsta-kvadrat felet är minst för ODA följt av NA och DMIA. ODA ger konsistenta skattningar under den första simulerade omkörningen men inte under den andra omkörningen. DMIA och NA är inte kon- sistenta på en 95 % signifikansnivå under någon av omkörningarna. ODA är robust och ger liknande resultat i simuleringarna med och utan sensorfel. DMIA och NA är känsliga mot sensorfel och ger instabila resultat. ODA är det klart bästa alternativet för sensorfusion inom objektföljning.

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43

McClure, Erin Kathleen. "An evolving-requirements technology assessment process for advanced propulsion concepts". Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-07062006-101749/.

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Thesis (Ph. D.)--Aerospace Engineering, Georgia Institute of Technology, 2007.
Danielle Soban, Committee Member ; Dimitri Mavris, Committee Chair ; Alan Porter, Committee Member ; Gary Seng, Committee Member ; Daniel Schrage, Committee Member.

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44

Bryant, Ross Becker 1957. "Laser light scattering and geographic information systems: Advanced methods for soil particle size analysis and data display". Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/278039.

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Laser light scattering (LLS) is an alternate method for determining soil particle size. Since the majority of information on particle size analysis has traditionally been derived from sedimentation methods, it is important to be able to draw a relationship between these two methods. Twenty four soil samples from a set of 214 samples analyzed by LLS were selected and also analyzed using sedimentation techniques. Particle size percentages were obtained in five different size ranges and then these two techniques were compared. Linear regression equations were developed that convert numbers obtained from the LLS method to a pipette analysis equivalent. This data was then utilized to eliminate the variation of soil moisture due to soil texture to obtain a moisture content independent of soil moisture. This "adjusted moisture" was displayed on a geographic information system to locate areas in the soil profile where soil moisture is relatively high. The high "adjusted moisture" contents occurred predominately below 2.44 meters (8 ft.) depths suggesting that the pre-irrigation applied to this soil reached this depth.

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45

Shackelford, Aaron K. "Development of urban area geospatial information products from high resolution satellite imagery using advanced image analysis techniques". Diss., Columbia, Mo. : University of Missouri-Columbia, 2004. http://hdl.handle.net/10355/4094.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2004.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (June 29, 2005) Vita. Includes bibliographical references.

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46

Stein, Nikolai Werner [Verfasser] y Christoph [Gutachter] Flath. "Advanced Analytics in Operations Management and Information Systems: Methods and Applications / Nikolai Werner Stein ; Gutachter: Christoph M. Flath". Würzburg : Universität Würzburg, 2019. http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-192668.

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47

Stein, Nikolai Werner [Verfasser] y Christoph M. [Gutachter] Flath. "Advanced Analytics in Operations Management and Information Systems: Methods and Applications / Nikolai Werner Stein ; Gutachter: Christoph M. Flath". Würzburg : Universität Würzburg, 2019. http://d-nb.info/1202013554/34.

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48

Aquilina, Paula. "Advanced interference management techniques for future generation cellular networks". Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28714.

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The demand for mobile wireless network resources is constantly on the rise, pushing for new communication technologies that are able to support unprecedented rates. In this thesis we address the issue by considering advanced interference management techniques to exploit the available resources more efficiently under relaxed channel state information (CSI) assumptions. While the initial studies focus on current half-duplex (HD) technology, we then move on to full-duplex (FD) communication due to its inherent potential to improve spectral efficiency. Work in this thesis is divided into four main parts as follows. In the first part, we focus on the two-cell two-user-per-cell interference broadcast channel (IBC) and consider the use of topological interference management (TIM) to manage inter-cell interference in an alternating connectivity scenario. Within this context we derive novel outer bounds on the achievable degrees of freedom (DoF) for different system configurations, namely, single-input single-output (SISO), multiple-input single-output (MISO) and multiple-input multiple-output (MIMO) systems. Additionally, we propose new transmission schemes based on joint coding across states that exploit global topological information at the transmitter to increase achievable DoF. Results show that when a single state has a probability of occurrence equal to one, the derived bounds are tight with up to a twofold increase in achievable DoF for the best case scenario. Additionally, when all alternating connectivity states are equiprobable: the SISO system gains 11/16 DoF, achieving 96:4% of the derived outer bound; while the MISO/MIMO scenario has a gain of 1/2 DoF, achieving the outer bound itself. In the second part, we consider a general G-cell K-user-per-cell MIMO IBC and analyse the performance of linear interference alignment (IA) under imperfect CSI. Having imperfect channel knowledge impacts the effectiveness of the IA beamformers, and leads to a significant amount of residual leakage interference. Understanding the extent of this impact is a fundamental step towards obtaining a performance characterisation that is more relevant to practical scenarios. The CSI error model used is highly versatile, allowing the error to be treated either as a function of the signal-to-noise ratio (SNR) or as independent of it. Based on this error model, we derive a novel upper bound on the asymptotic mean sum rate loss and quantify the DoF loss due to imperfect CSI. Furthermore, we propose a new version of the maximum signal-to-interference plus noise ratio (Max-SINR) algorithm which takes into account statistical knowledge of the CSI error in order to improve performance over the naive counterpart in the presence of CSI mismatch. In the third part, we shift our attention to FD systems and consider weighted sum rate (WSR) maximisation for multi-user multi-cell networks where FD base-stations (BSs) communicate with HD downlink (DL) and uplink (UL) users. Since WSR problems are non-convex we transform them into weighted minimum mean squared error (WMMSE) ones that are proven to converge. Our analysis is first carried out for perfect CSI and then expanded to cater for imperfect CSI under two types of error models, namely, a norm-bounded error model and a stochastic error model. Additionally, we propose an algorithm that maximises the total DL rate subject to each UL user achieving a desired target rate. Results show that the use of FD BSs provides significant gains in achievable rate over the use of HD BSs, with a gain of 1:92 for the best case scenario under perfect CSI. They also demonstrate the robust performance of the imperfect CSI designs, and confirm that FD outperforms HD even under CSI mismatch conditions. Finally, the fourth part considers the use of linear IA to manage interference in a multi-user multi-cell network with FD BSs and HD users under imperfect CSI. The number of interference links present in such a system is considerably greater than that present in the HD network counterpart; thus, understanding the impact of residual leakage interference on performance is even more important for FD enabled networks. Using the same generalised CSI error model from the second part, we study the performance of IA by characterising the sum rate and DoF losses incurred due to imperfect CSI. Additionally, we propose two novel IA algorithms applicable to this network; the first one is based on minimising the mean squared error (MMSE), while the second is based on Max-SINR. The proposed algorithms exploit statistical knowledge of the CSI error variance in order to improve performance. Moreover, they are shown to be equivalent under certain conditions, even though the MMSE based one has lower computational complexity. Furthermore for the multi-cell case, we also derive the proper condition for IA feasibility.

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49

Walker, Allisa M. "Knowledge portal support to the Naval Postgraduate School's advanced distributed learning program for the Information Systems and Operations curriculum". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA386259.

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Thesis (M.S. in Information Technology Management) Naval Postgraduate School, Dec. 2000.
Thesis advisor(s): Mark E. Nissen, Carl R. Jones. "December 2000." Includes bibliographical references (p. 53-54). Also available in print.

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50

MacFarlane, Robert Hywel. "Integrating behavioural models with GIS for land-use policy impact modelling". Thesis, University of Aberdeen, 1994. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU067330.

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In this project, a range of characteristics describing farmers as decision-makers and details of their land holdings are integrated within a Geographic Information System (GIS) and used to predict overall farm response to defined policy scenarios, for a study area in the upland fringe of Grampian Region. Agriculture has undergone considerable adjustments over the past 40 years, characterised by the processes of intensification and specialisation of farming systems. These changes have been essentially policy-driven, although the precise interaction of policy, technological and macro-economic forces are not entirely understood. Further to this, rural areas are subject to an increasing range of consumption demands which has stimulated a new range of land-use policy schemes, and constraints, on farmers and landowners. From a position of assured government support which was enjoyed by the majority of farmers until the mid-1980s, the policy situation has developed into one of uncertainty and some confusion over the requirements and responsibilities placed on individual farmers. This research links spatial, behavioural and economic elements which combine to condition farm-level response to policy change. The complexity of individuals' decision environments, coupled with the diversity of individuals' values, objectives and resources is immense. The focus is on individual farms, and the implications of change at the individual level in developing a model of farm-level response to policy and market shifts.

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Tesis sobre el tema "Advanced traveler information systems"

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