Study on External Cost of Urban Expressway Transport

In the paper, the external cost of urban expressway transportation was analyzed quantitatively by four aspects, including traffic congestion external cost, traffic accident external cost, air pollution cost and noise cost. Besides, the main road of the 3rd east ring expressway in Beijing is taken as an example to conduct the calculation of transport external cost according to different time period. In addition, the variation of transport external cost during different time periods in a day was analyzed in the paper. It was found that congestion external cost takes up the largest part of total external cost. With the increase of traffic volume and decrease of average speed, congestion external cost rises sharply.