基于交通仿真的隧道标线优化对通行效率和运行安全影响分析

Analysis on Influence of Optimizing Tunnel Markings on Traffic Efficiency and Operational Safety Based on Traffic Simulation

高速公路隧道内一旦发生拥堵,易造成驾驶人对前方拥堵状况判断失误,加大了隧道内交通事故发生的概率和严重程度。为支撑高速公路隧道通行效率和运营安全综合性提升,通过分析隧道交通事故和拥堵特性,确定了事故易发路段和拥堵成因,提出了隧道内车行道分界线施划虚实线和虚线的标线方案。通过VISSIM仿真软件分析了2种方案在3级和6级服务水平对应的交通量下对隧道通行效率和车辆运行安全的影响。结果表明:在3级服务水平下,虚实线方案对隧道通行效率和运行安全性提升均优于虚线方案,能够在一定程度上提升隧道路段的通行效率和车辆运行安全水平,但在6级服务水平下,采用2种标线方案对隧道通行效率和运行安全提升效果均不显著。

Once the traffic congestion occurs in the expressway tunnel,it is easy for drivers to misjudge the traffic congestion ahead,which increases the probability and severity of traffic accidents in the tunnel.In order to improve the traffic efficiency and operation safety of expressway tunnels,the accident-prone sections and the cause of traffic congestion are determined by analyzing the characteristics of traffic accidents and congestion in tunnels,and a scheme of marking the dividing line of traffic lane in tunnel with dotted solid line and dotted line is put forward.The effects of the 2 schemes on tunnel traffic efficiency and vehicle safety are analyzed with VISSIM simulation software under the traffic volume corresponding to level 3 and level 6 service levels.The result shows that the dotted-solid line scheme is better than the dotted-solid line scheme in improving the tunnel traffic efficiency and operation safety under the service level 3.It can improve the traffic efficiency and vehicle operation safety level of tunnel sections to a certain extent,but under the service level 6,the effect of 2 marking schemes on tunnel traffic efficiency and operation safety is not significant.