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light-duty-vehicles
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Projecting emission reductions from prospective mobile sources policies by road link-based modelling
, Article International Journal of Environment and Pollution ; Volume 53, Issue 1-2 , 2013 , Pages 87-106 ; 09574352 (ISSN) ; Arhami, M ; Sharif University of Technology
2013
Abstract
A methodology was developed to project total vehicular emissions from different emission reduction policies for the light-duty vehicles in the roads network of Tehran, Iran. A road-link-based model was constructed based on a bottom-up approach by coupling COPERT emission functions with the travel demand model of EMME/2. Results showed total emission from the studied network was largely impacted by vehicles' technology and age, speeds in the links, and fuel type. The proper transportation management to reduce the part of passenger cars and improve traffic flow also leads to a significant drop in the emission, e.g., emission decreased by 43% from 20% traffic volume reduction. Results indicated...
Institutional analysis on impediments over fuel consumption reduction at Iran's transportation niches
, Article Energy Policy ; Volume 129 , 2019 , Pages 861-867 ; 03014215 (ISSN) ; Maleki, A ; Doroudgar Hezaveh, E ; Karimi, M. S ; Sharif University of Technology
Elsevier Ltd
2019
Abstract
The transportation sector is one of the sustainable development wheels that requires a lot of energy to operate, therefore it is concerned as one of the main factors in greenhouse gas emissions and global warming. In Iran, like rest of the world, the light-duty vehicles are the effective factors in the pollution of the metropolitan cities. Although the management of their fuel consumption is a vital action in decreasing the cost and air pollution, that's inextricable link with the public welfare and the economy of the car manufacturers creates barriers. An accurate analysis concerning the barriers to reducing the fuel consumption can be obtained by using the game theory method in the...
A comparison of light-duty vehicles' high emitters fractions obtained from an emission remote sensing campaign and emission inspection program for policy recommendation
, Article Environmental Pollution ; Volume 286 , 2021 ; 02697491 (ISSN) ; Safavi, S. R ; Hosseini, V ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
Urban transportation is one of the leading causes of air pollution in big cities. In-use emissions of vehicles are higher than the emission control certification levels. The current study uses a roadside remote sensing emission monitoring campaign to investigate (a) fraction of high emitters in the light-duty vehicle (LDV) fleet and their contributions to the total emissions, (b) emission inspection (I/M) programs' effectiveness, and (c) alternate fuel (natural gas) encouragement policy. LDVs consist of passenger or freight transport vehicles with four wheels equivalent to classes M1 and N1 of European union vehicle classifications. The motivation is to assess the current emission inspection...
Particulate emissions of real-world light-duty gasoline vehicle fleet in Iran
, Article Environmental Pollution ; Volume 292 , 2022 ; 02697491 (ISSN) ; Arhami, M ; Hosseini, V ; Al Haddad, E ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Fine particulate matter cause profound adverse health effects in Iran. Road traffic is one of the main sources of particulate matter (PM) in urban areas, and has a large contribution in PM2.5 and organic carbon concentration, in Tehran, Iran. The composition of fine PM vehicle emission is poorly known, so this paper aims to determine the mixed fleet source profile by using the analysed data from the two internal stations and the emission factor for PM light-duty vehicles emission. Tunnels are ideal media for extraction vehicle source profile and emission factor, due to vehicles are the only source of pollutant in the urban tunnels. In this study, PM samples were collected simultaneously in...
Development of اot exhaust emission factors for iranian-made euro-2 certified light-duty vehicles
, Article Environmental Science and Technology ; Volume 50, Issue 1 , 2016 , Pages 279-284 ; 0013936X (ISSN) ; Hosseini, V ; Sharif University of Technology
American Chemical Society
2016
Abstract
Emission factors (EFs) are fundamental, necessary data for air pollution research and scenario implementation. With the vision of generating national EFs of the Iranian transportation system, a portable emission measurement system (PEMS) was used to develop the basic EFs for a statistically significant sample of Iranian gasoline-fueled privately owned light duty vehicles (LDVs) operated in Tehran. A smaller sample size of the same fleet was examined by chassis dynamometer (CD) bag emission measurement tests to quantify the systematic differences between the PEMS and CD methods. The selected fleet was tested over four different routes of uphill highways, flat highways, uphill urban streets,...