绕城高速公路与城市轨道交通停车换乘设施选址模型

Location Model of Park-and-ride Facilities of Ring Expressway and Urban Rail Transit

绕城高速公路与市区交通网络车流交换具有不同于其他公路的特征,其与城市轨道交通P&R设施选址要求亦不同.以绕城高速公路特征为切入点,在分析停车换乘设施选址原则的基础上,选取了停车换乘需求、停车换乘可靠性和建设用地需求3类7项P&R设施选址评价指标.运用物元评价方法,建立了绕城高速公路与城市轨道交通P&R设施选址物元评价模型,利用熵权法为各指标赋予权重,通过综合关联度把待选址站点分为优、良、中、差4个等级,选择在综合评价等级"优"的轨道交通站点附近设置P&R设施.所建模型应用在西安市绕城高速与城市轨道交通P&R设施选址中,结果表明,在西安绕城高速与轨道交通P&R设施选址中,主要制约因素是用地限制,和实际情况吻合.

The characteristics of traffic flow exchange between ring expressway and city transport network are different with other roads, so the demands on the location of park-and-ride（P＆R） facilities are different. Based on analyzing the principle of P＆R facility location, we select 7 evaluation indexes belong to the categories of P＆R demand, P＆R facility reliability, construction land demand. The matter-element model to select the P＆R facility location is established by using the method of matter-element evaluation. Meanwhile, we give the index weight employing entropy weight method. The alternative stations have been graded excellent, good, average and poor level according to their synthesis degree of association with every grade. P＆R facilities should be constructed near the stations with the excellent level. The proposed methodology is applied to a case of Xi＇an ring express P＆R facility location. The resulting analysis shows the construction land is the most important restrict factor in location of P＆R facilities, which are intuitively accountable and consistent with observed situation.