在交通预测中应用TRIPS软件对交通小区问题的处理研究

分析了在进行公路网规划的交通需求预测时,以行政区为单位的小区划分方法在交通量预分配与核查线调查流量存在较大偏差的原因.结合传统四阶段交通预测法提出二级分区的交通小区划分方法.给出根据此划分方法并应用TRIPS软件进行公路交通量预测的总体流程图,以及所需建立的两个主要模块,即交通分布模块和分配模块.还总结了建立抽象路网时如何合理选择小区中心点位置,以及建立小区中心联线时应该避免的几种不当方法.结合济南市干线公路网规划项目,给出一个交通小区抽象路网例图.

Traffic forecasting in traffic aone based on TRIPS software

The obvious deviation between traffic volume distribution and traffic flows investigated on verify lines if traffic zones are divided as administrative district when traffic demand is forecast for traffic nexwork planning.Combined with traditional four step traffic forecasting,a new method- twe level traffic zone division is proposed.The flow chart and two main modules- traffic distribution and traffic assignment are introduced for traffic forecasting using TRIPS software.Meanwhile,how to choose central points of zones and centroid connectors rationally are suggested by autors.Finally the arterial highway network planning of Ji'nan it taken as an example to illustrate abstraction of network among triffic zones.