ABSTRACT
The Existence of a safe, efficient, clean, fast, and economical public transportation system with the least environmental effects seems to be necessary with increasing population and people's need for using transport vehicles. The aim of this research is the investigation of air pollution in road transportation in Yazd-Ardakan route and estimation of the pollution at this route. In this study, the primary data were first collected by referring to the relevant organizations and departments and then by providing and distributing three questionnaires among drivers and passengers. The data were then analyzed by the Excell and Spss software for estimation of research results. The findings of this study indicated that transportation vehicles and relocation of the passengers in this route resulted in emission of annually 17.65 tons of suspended dust, 59.04 tons of hydrocarbons, 182.76 tons of carbon monoxide, 21.96 tons of sulfur dioxide and 40.8 tons of nitrogen oxide. Railway transportation because of reducing the emission of 286.31 tons of pollutants per year to the atmosphere and road accidents, improving traffic status in Yazd - Ardakan route, carrying many more number of passengers,having high efficiency on speed of transportation, saving and reducing of travel time, energy and cost of using personal vehicles and health proposed as a practical solution