高速公路施工导行区上游过渡区长度设置研究

Study on the Lengths of Upstream Transition Area in Freeway Reconstruction Guidance Section

高速公路改扩建期间通过设置导行区上游过渡区保障车辆由封闭车道平稳过渡到开放车道。实地采集滨莱高速路面拓宽、桥梁拼宽、互通改造、借对向车道通行、路基抬高、跨线桥、路改桥7种施工方案导行区上游过渡区交通流运行数据,通过单因素方差分析表明,互通改造与借对向车道通行导行区上游过渡区车头时距、运行车速不存在显著性差异。通过UC-win/Road驾驶模拟仿真实验,验证了路面拓宽、桥梁拼宽、互通改造3种施工方案上游过渡区长度的理论计算结果满足仿真实验需求,实际设置时可以采用按照可接受间隙理论计算得到的导行区上游过渡区长度。

During the reconstruction and expansion of the expressway,the upstream transition zone was set up to ensure the smooth transition of vehicles from the closed lane to the open lane.In this paper,traffic flow operation data of 7 construction schemes of Binlai expressway were collected on the spot,including road widening,bridge widening,interchange reconstruction,lane passage by using the road of opposite side,roadbed elevation,flyover and road to bridge.Single factor analysis of variance showed that there was no significant difference in headway and running speed between interchange reconstruction area and lane passage guide zone.Through the UC-win/Road driving simulation experiment,it is verified that the theoretical calculation results of the length of the upstream transition zone of the three construction schemes of road widening,bridge width and interchange reconstruction meet the requirements of the simulation experiment.In the actual setting,the length of the upstream transition zone of the leading road can be calculated according to the acceptable gap theory.