Study on the Reasonable Scale of the Urban Rail Transit Network: A Case of Xi'an City

In order to determine a reasonable scale of rail transit network in Xi'an, four influencing factors are analyzed. Based on the introduction of three indicators of rail transit network scale and the network density index, a method of rail transit network scale is proposed. Also, the determination method of parameters is given. The method is used to forecast the rail transit network scale with the actual situation of Xi'an. The result shows that the scale of Xi'an rail transit network is about 550km.