高速公路网假日交通流空间波动幅度指数分析与标定

采用宏观交通流理论,引入假日交通流空间波动幅度指数,从路网的点、线、面3个层面对假日交通流的空间波动性进行分析。依据高速公路收费系统中全样本交通流OD数据,按照最短路法把假日前后给定时间段和假日期间的OD交通量分配到路网上,按照假日交通流空间波动幅度指数计算模型,得到路网、路段和站点的波动幅度指数。根据上述模型,对2007年国庆假期前后共3周的交通流数据进行计算,得到山东省路网2007年国庆假日交通量空间波动幅度指数为15.9%。

Analysis and Calibration of Spatial Fluctuation Index for Expressway Holiday Traffic

With the application of the macroscopic traffic flow theories and the introduction of spatial fluctuation index,the characteristic of spatial fluctuation is analyzed among three aspects which are stations,sections and network.The data of OD traffic in three different periods is assigned by the shortest path law based on the full sample OD traffic data in the expressway tolling system.The spatial fluctuation index of network,sections and stations are calibrated by the traffic spatial volatility models.According to the above model,three weeks traffic data,before and after the National Holiday of 2007,has been calculated,and the spatial fluctuation index for Shandong Province expressway traffic in holiday is 15.9% by calibration.