The Examination of the Role of the Public Transportation in Reducing Fuel Consumption (A Case study of Tehran)

The recent research on the level of the fuel consumption in tehran have revealed that those vehicles using fossil fuels make a considerable portion of the fuel consumption. In order to scale down the congestion of Tehran's pathways and, therefore, the concerned negative implications of it, such as over-consumption of fuels, certain measures such as diving cars into odd and even based on their license plate numbers, increasing the traffic zone and so on were employed. Theses measures are implemented in order to persuade ordinary people to utilize less of private vehicles. However, concerning the fact that the plans are employed urgently and in emergency situations only, they couldnt be viewed as viable. One of the methods used to reduce the utilization of private vehicles is the expansion of public transportation, especially collective and high-velocity systems, like the subway system. In this paper, first a mathematical model delineating the level of fuel consumption in the system relative to the public transportation with its effects on the reduction of fuel consumption and the corresponding changes are under assessment. In these studies, first a mathematical model indicating the amount of fuel consumption in the network relative to the level of public transportation utilization is made and represented. In addition, according to this model, the role of public transportation in the fuel consumption will be represented. The results of the study indicate that in each travel done by public transportation in Tehran, instead of private vehicles, there is a reduction of 2 liters of fuel. If we assume that each community work force only does 3 travels a day (including the travel back home), with the assumption of 300 working days a year, it is easily calculated that by using public transportation, each person reduces 1800 liters from the system's fuel consumption.