analysis of bus service performance and its role in urban transportation, the case of zahedan city

urbanization development followed by increase in travel demand in recent years made some problems for cities such as traffic, lack of suitable parking, environmental issues, economic and social etc. meanwhile, public transport, especially bus services are very important in the development of urban functions thus, paying attention to different aspects of the transport in order to increase its efficiency is a great step toward solving these problems. based on the findings of this study, in zahedan about 684,000 daily within the city travels are done. but of these, only 120,000 is bus service's share (i.e. 17.5 percent of total daily trips), which is actually 8.5 percent less than the national average. in fact, based on international standards, the transport system of zahedan lacks 126 buses, while the existing capacities of the buses are not used properly. results of this research show that the reasons for the failure and inefficiency of bus service of zahedan are the lack of the necessary operating force (driver and serviceman) and lack of enough equipment and facilities in bus service, especially park ride facilities. the main finding of this study is that in order to optimize and improve the quality of the zahedan bus service, we should compensate deficiencies in the the number of operation forces and equipment and related facilities meanwhile, we should reform the existing network lines to reduce traffic on the one hand and cover blind spots of urban transport and ultimately increase the speed of transport.