机非混行公路养护作业警告区长度研究

Research on the Length of Advance Warning Area for Maintenance Work at Vehicle-Bicycle Mixed Highway

为了研究公路机非混行环境下警告区长度的取值,利用Vissim建立养护控制区的仿真模型,模拟了养护控制区的车辆运行,分析了设计速度、交通量和非机动车流量对排队长度的影响。结果表明:设计速度和非机动车流量对最大排队长度和平均排队长度的影响均不显著。排队长度随着交通量的增加而快速上升,平均排队长度和最大排队长度的分界点宜取1600 pcu/h/ln。在此基础上明确了不同设计速度公路车道减小引起的车辆排队长度取值,结合正常车速降至最终限速行驶距离和车辆至排队尾部所需最小安全距离的理论计算值,推荐了公路机非混行环境警告区的适宜长度。

In order to study the value of the length of advance warning area in the mixed traffic environment,the simulation model of maintenance work area was established by using Vissim,the vehicle operation in the maintenance work area was simulated,and the effects of design speed,motor and non-motor vehicle flows on the queue length were analyzed.The results show that the effects of design speed and non-motor vehicle flow on the maximum queue length and average queue length are not significant.The queue length increases rapidly with the increase of traffic volume.The dividing point between the average queue length and the maximum queue length is 1600 pcu/h/ln.Based on this,the values of vehicle queuing length caused by lane reduction on highways with different design speeds are clarified.Combined with the theoretical calculation values of the distance from normal speed to the final speed limit and the minimum safe distance from vehicles to the end of queuing,the appropriate length of advance warning area of highway under the condition of mixed traffic is recommended.