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Journal articles on the topic 'URBAN TRAFFIC EMISSION'

Author: Grafiati

Published: 11 September 2023

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1

Wang, Haiwei, Huiying Wen, Feng You, Jianmin Xu, and Hailin Kui. "Motor Vehicle Emission Modeling and Software Simulation Computing for Roundabout in Urban City." Mathematical Problems in Engineering 2013 (2013): 1–12. http://dx.doi.org/10.1155/2013/312396.

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In urban road traffic systems, roundabout is considered as one of the core traffic bottlenecks, which are also a core impact of vehicle emission and city environment. In this paper, we proposed a transport control and management method for solving traffic jam and reducing emission in roundabout. The platform of motor vehicle testing system and VSP-based emission model was established firstly. By using the topology chart of the roundabout and microsimulation software, we calculated the instantaneous emission rates of different vehicle and total vehicle emissions. We argued that Integration-Mode

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2

Šarić, Ammar, Suada Sulejmanović, Sanjin Albinović, Mirza Pozder, and Žanesa Ljevo. "The Role of Intersection Geometry in Urban Air Pollution Management." Sustainability 15, no. 6 (2023): 5234. http://dx.doi.org/10.3390/su15065234.

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Air pollution represents one of the most complex problems of humanity. Traffic contributes significantly to this by emitting large amounts of harmful gases. This problem is particularly pronounced at urban intersections due to frequent changes in vehicle movement dynamics. This paper primarily presents the influence of intersection geometry on pollutant emissions levels. In addition, the influence of various traffic policies promoting greater use of public transport and zero-emission vehicles is also examined. The research combines the field part of recording existing intersections in Sarajevo

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Jiang, Linhui, Yan Xia, Lu Wang, et al. "Hyperfine-resolution mapping of on-road vehicle emissions with comprehensive traffic monitoring and an intelligent transportation system." Atmospheric Chemistry and Physics 21, no. 22 (2021): 16985–7002. http://dx.doi.org/10.5194/acp-21-16985-2021.

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Abstract. Urban on-road vehicle emissions affect air quality and human health locally and globally. Given uneven sources, they typically exhibit distinct spatial heterogeneity, varying sharply over short distances (10 m–1 km). However, all-around observational constraints on the emission sources are limited in much of the world. Consequently, traditional emission inventories lack the spatial resolution that can characterize the on-road vehicle emission hotspots. Here we establish a bottom-up approach to reveal a unique pattern of urban on-road vehicle emissions at a spatial resolution 1–3 orde

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Csikós, Alfréd, Tamás Tettamanti, and István Varga. "MACROSCOPIC MODELING AND CONTROL OF EMISSION IN URBAN ROAD TRAFFIC NETWORKS." TRANSPORT 30, no. 2 (2015): 152–61. http://dx.doi.org/10.3846/16484142.2015.1046137.

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This work suggests a framework for modeling the traffic emissions in urban road traffic networks that are described by the Network Fundamental Diagram (NFD) concept. Traffic emission is formalized in finite spatiotemporal windows as a function of aggregated traffic variables, i.e. Total Travel Distances (TTDs) in the network and network average speed. The framework is extended for the size of an urban network during a signal cycle – the size of a window in which the network aggregated parameters are modeled in the NFD concept. Simulations have been carried out for model accuracy analysis, usin

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Alexandrino, Katiuska, Nazly E. Sánchez, Rasa Zalakeviciute, Wilber Acuña, and Fausto Viteri. "Polycyclic Aromatic Hydrocarbons in Araucaria heterophylla Needles in Urban Areas: Evaluation of Sources and Road Characteristics." Plants 11, no. 15 (2022): 1948. http://dx.doi.org/10.3390/plants11151948.

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Araucaria heterophylla needles were collected in urban areas of the city of Quito, Ecuador, to analyze the relationship between the concentration of polycyclic aromatic hydrocarbons (PAHs) with different emission sources and road characteristics. The PAHs were analyzed by high-performance liquid chromatography (HPLC) and included naphthalene (Naph), benzo[a]anthracene (BaA), chrysene (Chry), and benzo[a]pyrene (BaP), which are related to the sources considered in this work. The results indicated that some streets with moderate and low traffic intensity had higher total concentrations of PAHs t

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Bebkiewicz, Katarzyna, Zdzisław Chłopek, Hubert Sar, Krystian Szczepański, and Magdalena Zimakowska-Laskowska. "Assessment of impact of vehicle traffic conditions: urban, rural and highway, on the results of pollutant emissions inventory." Archives of Transport 60, no. 4 (2021): 57–69. http://dx.doi.org/10.5604/01.3001.0015.5477.

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The use of motor vehicles varies considerably under distinct traffic conditions: in cities, outside cities as well as on motorways and expressways. The impact of road traffic on the natural environment has been studied for many years, including in terms of the nature of the operation of motor vehicles. This problem is particularly important in highly urbanized areas, where traffic congestion is the source of increased emissions of harmful compounds contained in exhaust gases. For this reason, many cities have traffic restrictions, especially for those cars that do not meet the most stringent e

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Wang, Peng, Ruhan Zhang, Shida Sun, et al. "Aggravated air pollution and health burden due to traffic congestion in urban China." Atmospheric Chemistry and Physics 23, no. 5 (2023): 2983–96. http://dx.doi.org/10.5194/acp-23-2983-2023.

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Abstract. Vehicle emissions are regarded as a primary contributor to air pollution and related adverse health impacts. Heavy traffic congestion increases traffic flow and thus produces more O3 precursor emissions, leading to more adverse air quality issues. Although the development of a vehicle emission inventory has received great concern and continuous efforts, limitations still exist. For example, real-time diurnal variations and increases in emission rates due to traffic congestion are not well understood. In this study, we developed a new temporal allocation approach in transportation emi

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Bendtsen, Hans, and Lone Reiff. "An urban road traffic emission model." International Journal of Vehicle Design 20, no. 1/2/3/4 (1998): 192. http://dx.doi.org/10.1504/ijvd.1998.001813.

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9

Liu, Tao, Jia Sun, Baihua Liu, et al. "Factors Influencing O3 Concentration in Traffic and Urban Environments: A Case Study of Guangzhou City." International Journal of Environmental Research and Public Health 19, no. 19 (2022): 12961. http://dx.doi.org/10.3390/ijerph191912961.

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Ozone (O3) pollution is a serious issue in China, posing a significant threat to people’s health. Traffic emissions are the main pollutant source in urban areas. NOX and volatile organic compounds (VOCs) from traffic emissions are the main precursors of O3. Thus, it is crucial to investigate the relationship between traffic conditions and O3 pollution. This study focused on the potential relationship between O3 concentration and traffic conditions at a roadside and urban background in Guangzhou, one of the largest cities in China. The results demonstrated that no significant difference in the

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10

Wu, Luolin, Ming Chang, Xuemei Wang, et al. "Development of the Real-time On-road Emission (ROE v1.0) model for street-scale air quality modeling based on dynamic traffic big data." Geoscientific Model Development 13, no. 1 (2020): 23–40. http://dx.doi.org/10.5194/gmd-13-23-2020.

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Abstract. Rapid urbanization in China has led to heavy traffic flows in street networks within cities, especially in eastern China, the economically developed region. This has increased the risk of exposure to vehicle-related pollutants. To evaluate the impact of vehicle emissions and provide an on-road emission inventory with higher spatiotemporal resolution for street-network air quality models, in this study, we developed the Real-time On-road Emission (ROE v1.0) model to calculate street-scale on-road hot emissions by using real-time big data for traffic provided by the Gaode Map navigatio

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11

Tchepel, Oxana, Daniela Dias, Joana Ferreira, Richard Tavares, Ana Isabel Miranda, and Carlos Borrego. "EMISSION MODELLING OF HAZARDOUS AIR POLLUTANTS FROM ROAD TRANSPORT AT URBAN SCALE." TRANSPORT 27, no. 3 (2012): 299–306. http://dx.doi.org/10.3846/16484142.2012.720277.

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This study is focused on the development of a modelling approach to quantify emissions of traffic-related hazardous air pollutants in urban areas considering complex road network and detailed data on transport activity. In this work a new version of the Transport Emission Model for line sources has been developed for hazardous pollutants (TREM-HAP). Emission factors for benzene, 1,3-butadiene, formaldehyde, acetaldehyde, acrolein, naphthalene and also particulate matter (PM2.5) were implemented and the model was extended to integrate a probabilistic approach for the uncertainty quantification

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Yang, Daoyuan, Shaojun Zhang, Tianlin Niu, et al. "High-resolution mapping of vehicle emissions of atmospheric pollutants based on large-scale, real-world traffic datasets." Atmospheric Chemistry and Physics 19, no. 13 (2019): 8831–43. http://dx.doi.org/10.5194/acp-19-8831-2019.

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Abstract. On-road vehicle emissions are a major contributor to elevated air pollution levels in populous metropolitan areas. We developed a link-level emissions inventory of vehicular pollutants, called EMBEV-Link (Link-level Emission factor Model for the BEijing Vehicle fleet), based on multiple datasets extracted from the extensive road traffic monitoring network that covers the entire municipality of Beijing, China (16 400 km2). We employed the EMBEV-Link model under various traffic scenarios to capture the significant variability in vehicle emissions, temporally and spatially, due to the r

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Chen, Jiaguo, Xueyang Dai, Tao Zhou, and Qinmei Sun. "Analysis of Motor Vehicle Exhaust Emission Characteristics based on PEMS in Mountain Cities." Frontiers in Sustainable Development 3, no. 7 (2023): 11–25. http://dx.doi.org/10.54691/fsd.v3i7.5326.

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Taking a gasoline vehicle in Chongqing as the research object, PEMS testing technology was used to study the exhaust emission characteristics of motor vehicles during driving on roads in the central urban area of Chongqing. The focus was on analyzing the data situation and emission rates of different mountain scenes, and analyzing the carbon emission characteristics of road traffic in Chongqing. Through the analysis and comparison of data, it is shown that in terms of the carbon emissions characteristics of road traffic in Chongqing, through long-term measurement data analysis of comprehensive

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Li, Tao, Baoli Gong, Yong Peng, et al. "Analysis and Comparative Study of Signalized and Unsignalized Intersection Operations and Energy-Emission Characteristics Based on Real Vehicle Data." Energies 16, no. 17 (2023): 6235. http://dx.doi.org/10.3390/en16176235.

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With the development of the economy, urban road transportation has been continuously improved, and the number of motor vehicles has also increased significantly, leading to serious energy consumption issues. As critical nodes in the urban road transportation network, intersections have become a focal point of research on vehicle energy consumption. To investigate whether traffic signal lights affect fuel consumption and emissions, this study analyzed the operating characteristics, fuel consumption, and emissions of intersections with and without traffic signal lights using real-world vehicle d

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Kuik, Friderike, Andreas Kerschbaumer, Axel Lauer, Aurelia Lupascu, Erika von Schneidemesser, and Tim M. Butler. "Top–down quantification of NO<sub><i>x</i></sub> emissions from traffic in an urban area using a high-resolution regional atmospheric chemistry model." Atmospheric Chemistry and Physics 18, no. 11 (2018): 8203–25. http://dx.doi.org/10.5194/acp-18-8203-2018.

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Abstract. With NO2 limit values being frequently exceeded in European cities, complying with the European air quality regulations still poses a problem for many cities. Traffic is typically a major source of NOx emissions in urban areas. High-resolution chemistry transport modelling can help to assess the impact of high urban NOx emissions on air quality inside and outside of urban areas. However, many modelling studies report an underestimation of modelled NOx and NO2 compared with observations. Part of this model bias has been attributed to an underestimation of NOx emissions, particularly i

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Li, Xin, and Feng Chen. "Optimal Signal Timing of Single Intersection for Traffic Emission Control." Applied Mechanics and Materials 587-589 (July 2014): 2137–40. http://dx.doi.org/10.4028/www.scientific.net/amm.587-589.2137.

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Traffic emission is one of the main pollution sources of urban atmospheric environment. Traffic control scheme of intersection has important influence on vehicle emission. Research on low emission traffic signal control scheme has become one of focuses of Intelligent Transportation. Current typical control methods of traffic emission are based on optimizing the average delay and number of stops. However, it is extremely difficult to use mathematical formula to calculate the delay and the number of stops in the presence of initial queue length of intersection. In order to solve this problem, we

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Ou, Yifu, Ji Zheng, and Kyung-Min Nam. "Impacts of Urban Rail Transit on On-Road Carbon Emissions: A Structural Equation Modeling Approach." Atmosphere 13, no. 11 (2022): 1783. http://dx.doi.org/10.3390/atmos13111783.

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We examine the effects of urban rail transit on on-road carbon emissions in 90 Chinese cities, taking a structural equation modeling approach. Urban rail transit theoretically helps mitigate overall transport-sector emissions by absorbing part of the vehicular traffic demand or by generating traffic-diversion effects. However, its net contribution is obscure, given potential traffic-creation effects, since improved rail access can also incentivize new developments and thus induce additional on-road traffic. In contrast to many existing studies that neglect rail transit’s traffic-creation effec

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Wu, Na, and Yating Liu. "Potential of Ecological Benefits for the Continuous Flow Intersection." Promet 35, no. 1 (2023): 106–18. http://dx.doi.org/10.7307/ptt.v35i1.20.

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Energy conservation and emission reduction from the transportation sector are of great significance in coping with the global energy and environmental crisis. As the bottleneck of urban road traffic, intersection burdens the urban environment greatly. When the volume of left-turn traffic is large, the continuous flow intersection (CFI) can effectively improve intersection operation efficiency. This paper first put forward the definition and application conditions of CFI. Then its mechanism for energy saving and emission reduction was analysed. CFI transformation was designed taking a typical i

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19

Shan, Xiaonian, Xiaohong Chen, Wenjian Jia, and Jianhong Ye. "Evaluating Urban Bus Emission Characteristics Based on Localized MOVES Using Sparse GPS Data in Shanghai, China." Sustainability 11, no. 10 (2019): 2936. http://dx.doi.org/10.3390/su11102936.

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Bus emissions have become one of the important contributing factors in urban environmental pollution due to the frequent use of heavy-duty diesel engines in the day-time. Local bus driving cycles have a significant influence on bus emissions under the different traffic conditions. This study investigated the operation mode distributions and emission characteristics for urban buses based on localized MOtor Vehicle Emission Simulator (MOVES) using sparse Global Position System (GPS) data in Shanghai, China. Sparse GPS data from forty-three buses were prepared, and then bus trajectories were reco

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Macdonald, Elena, Noelia Otero, and Tim Butler. "A comparison of long-term trends in observations and emission inventories of NO<sub><i>x</i></sub>." Atmospheric Chemistry and Physics 21, no. 5 (2021): 4007–23. http://dx.doi.org/10.5194/acp-21-4007-2021.

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Abstract. Air pollution is a pressing issue that is associated with adverse effects on human health, ecosystems, and climate. Despite many years of effort to improve air quality, nitrogen dioxide (NO2) limit values are still regularly exceeded in Europe, particularly in cities and along streets. This study explores how concentrations of nitrogen oxides (NOx = NO + NO2) in European urban areas have changed over the last decades and how this relates to changes in emissions. To do so, the incremental approach was used, comparing urban increments (i.e. urban background minus rural concentrations)

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21

Zhang, Hong Liang. "Urban Vehicle Emissions Management under Uncertainty - A Traffic Planning Model with Interval-Parameter Programming." Advanced Materials Research 864-867 (December 2013): 1586–91. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.1586.

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In this study, an interval-parameter programming method has been used for urban vehicle emissions management under uncertainty. The model improves upon the existing optimization methods with advantages in uncertainty reflection, system costs and limitation of emission. Moreover, the model is applied to a case study of urban vehicle emissions management in a virtual city. The results indicate that the interval linear traffic planning model can effectively reduce the vehicles emission and provide strategies for authorities to deal with problems of transportation system.

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Gu, Chaoyi, Reza Farzaneh, Geza Pesti, Gabriel Valdez, and Andrew Birt. "Estimating Vehicular Emission Impact of Nighttime Construction with VISSIM and Different MOVES Emission Estimation Approaches." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 25 (2018): 174–86. http://dx.doi.org/10.1177/0361198118798988.

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Shifting work zones from daytime to nighttime is a potential solution to air quality issues on roadway with high traffic volume and where it is undesirable to close lanes during peak hours. The expected benefit of such shifting is to reduce total fuel consumption and on-road vehicle emissions. However, the magnitude of emission reductions and air quality impacts has not been examined comprehensively at work zones. The study presented in this paper investigated the traffic-related emission impacts of work zones using an urban freeway case study. A VISSIM test bed combined with the Environmental

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Zhang, Yi, Li Juan Wan, Li Zhang, and Dong Xiang Cheng. "Forecast of Energy Consumption and Carbon Emission of Urban Traffic by Using System Dynamics." Advanced Materials Research 989-994 (July 2014): 1248–51. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.1248.

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In the future development of city, traffic acts a very important role, which not only support the modernization of city, but also offer more travel and transportation service for the increasing city population. Therefore, it is necessary to study the urban traffic, energy consumption and carbon emission based on System Dynamics. System Dynamics not only offer quantificational references and advice about city planning for the government, but also make people understand the present status of urban traffic and possible development trend of urban traffic under the influence of different policies.

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Doumbia, Madina, Adjon A. Kouassi, Siélé Silué, et al. "Road Traffic Emission Inventory in an Urban Zone of West Africa: Case of Yopougon City (Abidjan, Côte d’Ivoire)." Energies 14, no. 4 (2021): 1111. http://dx.doi.org/10.3390/en14041111.

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Road traffic emission inventories based on bottom-up methodology, are calculated for each road segment from fuel consumption and traffic volume data obtained during field measurements in Yopougon. High emissions of black carbon (BC) from vehicles are observed at major road intersections, in areas surrounding industrial zones and on highways. Highest emission values from road traffic are observed for carbon monoxide (CO) (14.8 t/d) and nitrogen oxides (NOx) (7.9 t/d), usually considered as the major traffic pollution tracers. Furthermore, peak values of CO emissions due to personal cars (PCs) a

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Ghermandi, Grazia, Sara Fabbi, Giorgio Veratti, Alessandro Bigi, and Sergio Teggi. "Estimate of Secondary NO2 Levels at Two Urban Traffic Sites Using Observations and Modelling." Sustainability 12, no. 19 (2020): 7897. http://dx.doi.org/10.3390/su12197897.

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Assessing secondary and primary NO2 in urban areas is important to support carefully designed environmental policies, particularly in areas with recurrent exceedance of NO2 regulatory limits. The share of secondary NO2 was preliminary estimated in intense traffic areas of Modena and Reggio Emilia (Northern Italy) by the combined analysis of regulatory air quality observations at urban traffic and urban background conditions. In addition simulations performed by the Lagrangian particle dispersion models Micro SWIFT SPRAY and the chemical transport model WRF-Chem were performed. The former was a

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Zhang, Na, Zijia Wang, Feng Chen, Jingni Song, Jianpo Wang, and Yu Li. "Low-Carbon Impact of Urban Rail Transit Based on Passenger Demand Forecast in Baoji." Energies 13, no. 4 (2020): 782. http://dx.doi.org/10.3390/en13040782.

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There are increasing traffic pollution issues in the process of urbanization in many countries; urban rail transit is low-carbon and widely regarded as an effective way to solve such problems. The passenger flow proportion of different transportation types is changing along with the adjustment of the urban traffic structure and a growing demand from passengers. The reduction of carbon emissions brought about by rail transit lacks specific quantitative research. Based on a travel survey of urban residents, this paper constructed a method of estimating carbon emissions from two different scenari

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Alfoldy, Balint, Asta Gregorič, Matic Ivančič, Irena Ježek, and Martin Rigler. "Source apportionment of black carbon and combustion-related CO₂ for the determination of source-specific emission factors." Atmospheric Measurement Techniques 16, no. 1 (2023): 135–52. http://dx.doi.org/10.5194/amt-16-135-2023.

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Abstract. Black carbon (BC) aerosol typically has two major sources in the urban environment: traffic and domestic biomass burning, which has a significant contribution to urban air pollution during the heating season. Traffic emissions have been widely studied by both laboratory experiments (individual vehicle emission) and real-world measurement campaigns (fleet emission). However, emission information from biomass burning is limited, especially an insufficiency of experimental results from real-world studies. In this work, the black carbon burden in the urban atmosphere was apportioned to f

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Andrych-Zalewska, Monika, Zdzislaw Chlopek, Jerzy Merkisz, and Jacek Pielecha. "Investigations of Exhaust Emissions from a Combustion Engine under Simulated Actual Operating Conditions in Real Driving Emissions Test." Energies 14, no. 4 (2021): 935. http://dx.doi.org/10.3390/en14040935.

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The paper describes the methodology of research of exhaust emissions from a combustion engine under engine states determined by the vehicle actual operation in the RDE test. The processes of quantities determining the vehicle motion and engine states have been recorded, along with the exhaust emission intensity. Based on the developed research methodology, zero-dimensional characteristics of the processes of the emission intensity have been determined under the conditions of urban, rural and motorway traffic, as well as in the entire test. The authors also determined the average specific dista

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Dai, Hongna, Enjian Yao, and Rui Zhao. "Research on Congestion Pricing in Multimode Traffic considering Delay and Emission." Discrete Dynamics in Nature and Society 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/769251.

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Rapid development of urbanization and automation has resulted in serious urban traffic congestion and air pollution problems in many Chinese cities recently. As a traffic demand management strategy, congestion pricing is acknowledged to be effective in alleviating the traffic congestion and improving the efficiency of traffic system. This paper proposes an urban traffic congestion pricing model based on the consideration of transportation network efficiency and environment effects. First, the congestion pricing problem under multimode (i.e., car mode and bus mode) urban traffic network conditi

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Stan, Ioan, Daniel Alexandru Ghere, Paula Iarina Dan, and Rodica Potolea. "Urban Congestion Avoidance Methodology Based on Vehicular Traffic Thresholding." Applied Sciences 13, no. 4 (2023): 2143. http://dx.doi.org/10.3390/app13042143.

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Vehicular traffic in urban areas faces congestion challenges that negatively impact our lives. The infrastructure associated with intelligent transportation systems provides means for addressing the associated challenges in urban areas. This study proposes an effective and scalable vehicular traffic congestion avoidance methodology. It introduces a traffic thresholding mechanism to predict and avoid vehicular traffic congestion during route computation. Our methodology was evaluated and validated by employing four road network topologies, three vehicular traffic density levels and various traf

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Karjalainen, P., H. Timonen, E. Saukko, et al. "Time-resolved characterization of primary and secondary particle emissions of a modern gasoline passenger car." Atmospheric Chemistry and Physics Discussions 15, no. 22 (2015): 33253–82. http://dx.doi.org/10.5194/acpd-15-33253-2015.

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Abstract. Changes in traffic systems and vehicle emission reduction technologies significantly affect traffic-related emissions in urban areas. In many densely populated areas the amount of traffic is increasing, keeping the emission level high or even increasing. To understand the health effects of traffic related emissions, both primary and secondary particles that are formed in the atmosphere from gaseous exhaust emissions need to be characterized. In this study we used a comprehensive set of measurements to characterize both primary and secondary particulate emissions of a modern gasoline

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Zhou, Jingcheng, Junfeng Liu, Songlin Xiang, et al. "Evaluation of the Street Canyon Level Air Pollution Distribution Pattern in a Typical City Block in Baoding, China." International Journal of Environmental Research and Public Health 19, no. 16 (2022): 10432. http://dx.doi.org/10.3390/ijerph191610432.

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Urban traffic pollution, which is strongly influenced by the complex urban morphology, has posed a great threat to human health. In this study, we performed a high-resolution simulation of traffic pollution in a typical city block in Baoding, China, based on the Parallelized Large-eddy simulation Model (PALM), to examine the distribution patterns of traffic-related pollutants and explore their relationship with urban morphology. Based on the model results, we conducted a multi-linear regression (MLR) analysis and found that the distribution of air pollutants inside the city block was dominated

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Yang, Qing, and Mei Mei Huang. "Study on Exhaust Diffusion Control in Urban Trunk Intersection." Key Engineering Materials 579-580 (September 2013): 851–55. http://dx.doi.org/10.4028/www.scientific.net/kem.579-580.851.

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With vehicle population increase, urban trunk traffic flows augment significantly. Traffic environmental problems are become progressively severe challenge, such as congestion, emissions, and photoacoustic pollution. In view of exhaust pollution diffusion problems in urban trunk intersection, this article took North Bayi Street - South Bayi Street in Jinhua as case, carried out traffic surveys of trunk along, tested vehicle exhaust pollutants concentration of intersections, analyzed the exhaust diffusion characteristics of trunk along during the early peak, evening peak and working hours on wo

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Jamshidnejad, Anahita, Ioannis Papamichail, Markos Papageorgiou, and Bart De Schutter. "A mesoscopic integrated urban traffic flow-emission model." Transportation Research Part C: Emerging Technologies 75 (February 2017): 45–83. http://dx.doi.org/10.1016/j.trc.2016.11.024.

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Wang, Junjie, Yuan Li, and Yi Zhang. "Research on Carbon Emissions of Road Traffic in Chengdu City Based on a LEAP Model." Sustainability 14, no. 9 (2022): 5625. http://dx.doi.org/10.3390/su14095625.

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With the continuous increase in the number of vehicles, the proportion of carbon emissions from road traffic in cities has significantly increased, putting pressure on the overall carbon emission reduction of cities The implementation of low-carbon transportation has, therefore, become crucial to urban emission reductions. Based on the situation of vehicles in Chengdu, this study uses the LEAP model to construct a road traffic development scenario in Chengdu from 2020 to 2025. The research focuses on common greenhouse gases that contribute to carbon emissions such as CO2, N2O, and CH4 from mot

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Reche, C., X. Querol, A. Alastuey, et al. "New considerations for PM, Black Carbon and particle number concentration for air quality monitoring across different European cities." Atmospheric Chemistry and Physics 11, no. 13 (2011): 6207–27. http://dx.doi.org/10.5194/acp-11-6207-2011.

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Abstract. In many large cities of Europe standard air quality limit values of particulate matter (PM) are exceeded. Emissions from road traffic and biomass burning are frequently reported to be the major causes. As a consequence of these exceedances a large number of air quality plans, most of them focusing on traffic emissions reductions, have been implemented in the last decade. In spite of this implementation, a number of cities did not record a decrease of PM levels. Thus, is the efficiency of air quality plans overestimated? Do the road traffic emissions contribute less than expected to a

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Aalto, T., M. Lallo, J. Hatakka, and T. Laurila. "Atmospheric hydrogen variations and traffic emissions at an urban site in Finland." Atmospheric Chemistry and Physics Discussions 9, no. 3 (2009): 13917–42. http://dx.doi.org/10.5194/acpd-9-13917-2009.

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Abstract. Atmospheric hydrogen (H2) mixing ratios were observed over one year period from summer 2007 to 2008 in Helsinki, Finland. Relatively stable background values of hydrogen were occasionally observed at the site, with minimum in October and maximum between March and May. High hydrogen mixing ratios occurred simultaneously with high carbon monoxide (CO) values and coincided with high traffic flow periods. Carbon monoxide and radon (222Rn) were continuously monitored at the same site and they were used in estimation of the hydrogen emissions from traffic. The morning rush hour slope of ΔH

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Aalto, T., M. Lallo, J. Hatakka, and T. Laurila. "Atmospheric hydrogen variations and traffic emissions at an urban site in Finland." Atmospheric Chemistry and Physics 9, no. 19 (2009): 7387–96. http://dx.doi.org/10.5194/acp-9-7387-2009.

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Abstract. Atmospheric hydrogen (H2) mixing ratios were observed over a one year period from summer 2007 to 2008 in Helsinki, Finland. Relatively stable background values of hydrogen were occasionally observed at the site, with minimum in October and maximum between March and May. High hydrogen mixing ratios occurred simultaneously with high carbon monoxide (CO) values and coincided with high traffic flow periods. Carbon monoxide and radon (222Rn) were continuously monitored at the same site and they were used in estimation of the hydrogen emissions from traffic. The morning rush hour slope of

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Reche, C., X. Querol, A. Alastuey, et al. "Variability of levels of PM, black carbon and particle number concentration in selected European cities." Atmospheric Chemistry and Physics Discussions 11, no. 3 (2011): 8665–717. http://dx.doi.org/10.5194/acpd-11-8665-2011.

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Abstract. In many large cities of Europe standard air quality limit values of particulate matter (PM) are exceeded. Emissions from road traffic and biomass burning are frequently reported to be the major causes. As a consequence of these exceedances a large number of air quality plans, most of them focusing on traffic emissions reductions, have been implemented in the last decade. In spite of this implementation, a number of cities did not record a decrease of PM levels. Thus, is the efficiency of air quality plans overestimated? Or do we need a more specific metric to evaluate the impact of t

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Wiśniowski, Piotr, Marcin Slezak, and Andrzej Niewczas. "Simulation of road traffic conditions on a chassis dynamometer." Archives of Automotive Engineering – Archiwum Motoryzacji 84, no. 2 (2019): 171–78. http://dx.doi.org/10.14669/am.vol84.art12.

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The article presents and compares the results of exhaust emission tests in conditions of real vehicle traffic with the results obtained during bench tests on a chassis dynamometer in conditions of road traffic simulation. A series of tests were carried out using a mobile exhaust analyzer and a vehicle speed recorder. The research route was designated in the center of a large urban agglomeration. Laboratory tests were designed according to an algorithm approximating the actual driving sections, and when choosing their order during the test construction, a random factor was introduced. The prese

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Du, Canyi, Xinfa Qiu, Feng Li, and Ming Cai. "A simulation of traffic noise emissions at a roundabout based on a cellular automaton model." Acta Acustica 5 (2021): 42. http://dx.doi.org/10.1051/aacus/2021037.

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The calculation and evaluation of traffic noise is an important task in urban road design. Roundabouts are a common form of urban road intersection. The complexity of traffic operations makes the calculation of traffic noise near a roundabout challenging. To explore traffic noise at roundabouts, a cellular automaton traffic flow model for a two-lane roundabout is established. Based on this model, a dynamic simulation method for traffic noise at roundabouts is proposed. The traffic operation and noise emissions at a roundabout are simulated. The vehicle speed distribution and traffic noise dist

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Du, Canyi, Xinfa Qiu, Feng Li, and Ming Cai. "A simulation of traffic noise emissions at a roundabout based on a cellular automaton model." Acta Acustica 5 (2021): 42. http://dx.doi.org/10.1051/aacus/2021037.

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The calculation and evaluation of traffic noise is an important task in urban road design. Roundabouts are a common form of urban road intersection. The complexity of traffic operations makes the calculation of traffic noise near a roundabout challenging. To explore traffic noise at roundabouts, a cellular automaton traffic flow model for a two-lane roundabout is established. Based on this model, a dynamic simulation method for traffic noise at roundabouts is proposed. The traffic operation and noise emissions at a roundabout are simulated. The vehicle speed distribution and traffic noise dist

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Mądziel, Maksymilian. "Vehicle Emission Models and Traffic Simulators: A Review." Energies 16, no. 9 (2023): 3941. http://dx.doi.org/10.3390/en16093941.

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Accurate estimations and assessments of vehicle emissions can support decision-making processes. Current emission estimation tools involve several calculation methods that provide estimates of the exhaust components that result from driving on urban arterial roads. This is an important consideration, as the emissions generated have a direct impact on the health of pedestrians near the roads. In recent years, there has been an increase in the use of emission models, especially in combination with traffic simulator models. This is because it is very difficult to obtain an actual measurement of r

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Salameh, T., S. Sauvage, C. Afif, A. Borbon, and N. Locoge. "Source apportionment vs. emission inventories of non-methane hydrocarbons (NMHC) in an urban area of the Middle East: local and global perspectives." Atmospheric Chemistry and Physics Discussions 15, no. 19 (2015): 26795–837. http://dx.doi.org/10.5194/acpd-15-26795-2015.

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Abstract. We applied the Positive Matrix Factorization model to two large datasets collected during two intensive measurement campaigns (summer 2011 and winter 2012) at a sub-urban site in Beirut, Lebanon, in order to identify NMHC sources and quantify their contribution to ambient levels. Six factors were identified in winter and five factors in summer. PMF-resolved source profiles were consistent with source profiles established by near-field measurements. The major sources were traffic-related emissions (combustion and gasoline evaporation) in winter and in summer accounting for 51 and 74 w

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Shepelev, Vladimir, Aleksandr Glushkov, Ivan Slobodin, and Yuri Cherkassov. "Measuring and Modelling the Concentration of Vehicle-Related PM2.5 and PM10 Emissions Based on Neural Networks." Mathematics 11, no. 5 (2023): 1144. http://dx.doi.org/10.3390/math11051144.

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The urban environment near the road infrastructure is particularly affected by traffic emissions. This problem is exacerbated at road junctions. The roadside concentration of particulate (PM2.5 and PM10) emissions depends on traffic parameters, meteorological conditions, the characteristics and condition of the road surface, and urban development, which affects air flow and turbulence. Continuous changes in the structure and conditions of the traffic flow directly affect the concentration of roadside emissions, which significantly complicates monitoring and forecasting the state of ambient air

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Crosignani, Paolo, Alessandro Nanni, Nicola Pepe, et al. "The Effect of Non-Compliance of Diesel Vehicle Emissions with Euro Limits on Mortality in the City of Milan." Atmosphere 12, no. 3 (2021): 342. http://dx.doi.org/10.3390/atmos12030342.

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Diesel exhaust is hazardous to human health. In time, this has led the EU to impose on manufacturers lower and lower emission standards. These limits are very challenging in particular for nitrogen oxides (NOx) emitted by diesel-fueled vehicles. For the town of Milan (Italy), we used a complex modeling system that takes into account the NOx emissions from vehicular traffic and other urban sources, as well as their dispersion and chemical transformations in the atmosphere related to meteorological parameters. The traffic emissions in the Milan urban area were estimated using the geometric and s

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Saedi, Ramin, Rajat Verma, Ali Zockaie, Mehrnaz Ghamami, and Timothy J. Gates. "Comparison of Support Vector and Non-Linear Regression Models for Estimating Large-Scale Vehicular Emissions, Incorporating Network-Wide Fundamental Diagram for Heterogeneous Vehicles." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 5 (2020): 70–84. http://dx.doi.org/10.1177/0361198120914304.

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Estimation of vehicular emissions at network level is a prominent issue in transportation planning and management of urban areas. For large networks, macroscopic emission models are preferred because of their simplicity. However, these models do not consider traffic flow dynamics that significantly affect emissions production. This study proposes a network-level emission modeling framework based on the network-wide fundamental diagram (NFD), via integrating the NFD properties with an existing microscopic emission model. The NFD and microscopic emission models are estimated using microscopic an

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Zeng, Lin Hui, and Guang Ming Li. "World Expo 2010 Promotes the Reduction in Carbon Emissions of Urban Transport." Applied Mechanics and Materials 522-524 (February 2014): 1826–30. http://dx.doi.org/10.4028/www.scientific.net/amm.522-524.1826.

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Transport sector is one of the main sources of anthropogenic greenhouse gases (GHG) emissions. Comprehensive countermeasures are needed in cities to mitigate transport GHG emissions. After reviewing green traffic measures that implemented by Shanghai since bidding for Expo 2010, this paper analyzes the achievement that Shanghai has made in carbon mitigation. The results showed that travel demand management and the constrcution public transportation infrastructure promoted by the event played a vital role in promoting mode shift to form public transport oriented traffic system. Carbon emission

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Czader, B. H., Y. Choi, X. Li, S. Alvarez, and B. Lefer. "Impact of updated traffic emissions on HONO mixing ratios simulated for urban site in Houston, Texas." Atmospheric Chemistry and Physics Discussions 14, no. 15 (2014): 21315–40. http://dx.doi.org/10.5194/acpd-14-21315-2014.

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Abstract. Recent measurements in Houston show that HONO traffic emissions are 1.7% of NOx emissions which is about twice the previously estimated value of 0.8% based on tunnel measurements in 2001. The 0.8% value is widely used to estimate mobile emissions of HONO for air quality modeling applications. This study applies the newly estimated HONO/NOx ratio in the WRF-SMOKE-CMAQ modeling system and estimates the impact of higher HONO traffic emissions on its mixing ratios. Since applied emission inventory resulted in overestimates of NOx mixing ratios and because HONO emissions and chemical form

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Meidiana, C., D. H. Leliana, and D. Agustina. "Potential of urban greening for carbon dioxide reduction from transportation sector." IOP Conference Series: Earth and Environmental Science 916, no. 1 (2021): 012005. http://dx.doi.org/10.1088/1755-1315/916/1/012005.

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Abstract Various urban activities which exist in different lands uses in Mojokerto City such as settlement, commercial area, public service, and industrial area form the urban dynamic. Urban dynamic is stimulated by some factors including mobility of people and goods, information, and money. People’s mobility which dominates the urban mobility is accommodated by transportation mode causing transportation sector ranks the top first sector contributing to carbon dioxide (CO2) emissions in urban area, including Mojokerto City. Therefore, the study aims to propose reasonable solution for CO2 emiss

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