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大交通量状态下的高速公路改扩建施工区,与一般施工区在交通组织方案、施工区设置、限速方案等道路交通特性上会产生巨大差异,交通延误、饱和度、平均车速和交通密度会有明显不同。本文利用微观交通仿真软件Vissim建立施工区微观仿真模型,选择对高速公路改扩建施工区安全和通畅水平有重要影响的上游过渡区长度为变量,以通畅水平为指标,对车辆运行状况进行评价,给改扩建施工交通分流提供参考。
Large-volume traffic conditions of the highway reconstruction area, with the general construction area in the traffic organization programs, construction area settings, speed limit program and other road traffic characteristics will have a huge difference, traffic delays, saturation, average speed and traffic density There will be significant differences. In this paper, the micro-traffic simulation software Vissim is used to establish the microscopic simulation model of construction area. The length of the upstream transition zone, which has an important influence on the safety and smoothness level of the expressway construction area, is selected as the variable, and the vehicle running status is evaluated with the unobstructed level as an indicator. To provide reference for traffic diversion construction and reconstruction.