基于熵方法的高速公路作业区布局方案仿真与评价

Evaluation of Road Layout of Upstream Transition Area in the Highway Based on Entropy

为解决高速公路作业区对交通流产生的不利影响,提出对作业区域进行新的布局方案,经过论证,新方案可以有效减少作业区域的交通拥挤,提高交通效率。在考虑交通流量和大型车占有率等影响因素情况下,应用VISSIM软件对作业区情况进行模拟,针对新的布局方案提出基于熵的两种评价方法:(1)运用模糊熵模型计算延误时间复杂度的评价方法,对作业区交通流进行复杂度测度;(2)通过熵值法确定仿真结果中权重指标,对新的布局方案进行综合评估。评价结果表明:改善后的作业区布局可以减少车辆停车时间和排队长度,降低了车流的复杂度,从而提高作业区车辆的通行效率与运行安全。

To solve the congestion at the confluence of highway work zones,a method is proposed,in which a short section of adjacent lane of upstream transition region is closed,and it can efficiently improve the transportation.Considering the influence factors,such as highway traffic volume and large vehicle proportion etc,VISSIM microscopic simulation technology is employed.The evaluation system of entropy is put forward to evaluate the complexity of traffic flow in work zone and determine the index weights.According to the calculation results,the new layout scheme can reduce the vehicle parking time,queue length and the complexity of work zone traffic flow,so that the efficiency and safety of traffic operation can be improved.