The Share of Different Vehicles in Air Pollutant Emission in Tehran, Using 2013 Traffic Information

• Main Authors: Ahmad Jonidi Jafari, Mojtaba ehsanifar, Housein Arfaeinia
• Format: Article
• Language: English
• Published: Guilan University of Medical Sciences 2016-12-01
• Series: Caspian Journal of Health Research
• Subjects: Criteria air pollutants; Emission factor; Vehicles; Tehran’s air pollution
• Online Access: http://cjhr.gums.ac.ir/browse.php?a_code=A-10-128-2&slc_lang=en&sid=1

Objectives: Investigating and determining the share of urban sources of air pollutants is an essential step in pollution control management. Studies indicate the main source of air pollution in Tehran is the indiscriminate use of energy, while vehicles produce more than 85% of air pollution. Thus vehicles have the most important role in Tehran’s air pollution. Methods:  The present study investigated the share of different types of vehicles in Tehran according to fuel consumption and emission factors and based on output data from the EMME/2 software of Tehran Comprehensive Transportation and Traffic Studies in a morning peak hour in 2013. Results: The emissions of criteria pollutants (CO, HC, NOX, SOX, and P.M.) vary in different types of gasoline and diesel vehicles according to emission factors, type and number of vehicles, fuel consumption, and car mileage. Generally, in a traffic peak hour in a morning in 2013, the share of a variety of sedans, taxis, motorcycles, pickups, minibuses, public buses, trucks, and school buses in pollutants emission was 48.36, 18.87, 16.02, 10.35, 1.50, 2.49, 1.28, 1.13 percent, respectively. Conclusion:  A trip by sedans or motorcycles emits 97 times and a trip by taxi emits 63 times as air pollutants as a trip by public buses. Therefore, raising public awareness about emissions of criteria air pollutants by vehicles for one trip or traverse of one kilometer in the city, and also encouraging them to manage their trips and make optimal use of private and public vehicles play important roles in reducing Tehran’s air pollution.