运用车流波动理论分析大货车混入对快速路车流的影响

随着城市对外交通需求的增加,大量大型货车进入快速路,大货车由于慢速引起后随车辆被迫减速,造成车流整体通行效率严重降低。运用车流波动理论确定大货车占道所引起车流的状态变化,定量分析大货车速度及其占道长度与堵塞时间、受阻车辆数之间的关系,从而说明大货车占道对车流延误的影响程度。通过定量分析明确划分大货车车道、快速路最低限速以及限制快速路大货车比例的重要性,从而为快速路混合车流管理提供依据。

Analyzing Impact of Large-Scale Trucks on Vehicles Stream of Expressway Using Traffic Flow Wave Theory

With the increasing demands for outbound traffic,more low speed large-scale trucks get into expressway and force the following vehicles to decelerate,which leads to an inefficient traffic flow.The traffic flow wave theory is applied to determine the state changes of traffic flow caused by the large-scale truck lane.The quantitative analysis of the relationships among some influence factors,such as the speed of large-scale truck and the length of lane occupied by the truck,the jamming time,and the blocked vehicles are carried out,the extent to which the on-road trucks affect the traffic flow is indicated,and the importance of a clear division of large-scale truck lanes,the importance of the expressway minimum speed and that of the limited expressway truck proportion are finally pointed out.to provide the basis for expressway mixed traffic flow management.