Document Type : علمی - پژوهشی


1 Assistant Professor, Environmental Science Research Institute University of Shahid Beheshti

2 PhD of Environmental Planning, Faculty of Environment, University of Tehran

3 PhD Candidate of Environmental Management, Faculty of Environment and Energy, Azad University of Science and Research, Tehran Branch.


The transportation sector is the fastest growing energy demand in the world and it has created many economic and environmental problems for both industrial and developing countries. Economic problems, including high inflation and low developed public transport, are the main causes of the spread using of obsolete private vehicles in Iran that and this has imposed high costs on the society. In this research for estimating the social cost of obsolete cars, first of all the number of old cars in the country has been calculated and, then the social cost that old cars impose on the community have been calculated by assessing the effect of each pollutant gas. The result shows that, in 2011, although only about 11 percent of the country’s cars were old, they cause more than 75 percent of pollutant emissions and this has also imposed about 32 million dollars social costs to the society. To reduce this cost, it is necessary to have a well managed integrated transport system operated by governmental and private sectors.


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