南北高架交织区与地面路网协同组织研究

Traffic Collaborative Organization of the Weaving Segment of North-South Elevated Expressway and the Ground Road Network

交织区是城市快速路的瓶颈段,车辆变道交织行为是导致交通运行紊乱、通行效率下降、安全隐患增加的主要原因,易形成秩序乱点、交通堵点和事故黑点。对条件受限的交织段,优化交通组织来缓解拥堵显得尤为重要。以南北高架(北京西路上匝道至威海路下匝道)交织区为例,基于现状运行特征与问题分析,对交织区的部分交通流向采取限行措施,简化交织流线,由地面路网分担绕行流量或分散至其他入口重新进入快速路系统。最后,运用交通仿真工具进行方案评估和比选,解决思路和方法可为其他交织区的交通改善提供参考。

The weaving segment is the bottleneck section of urban expressway.Lane changing and interweaving behavior of vehicles is the main reason for traffic disorder,traffic efficiency declining and safety risks increasing,which easily forms disorderly points,traffic congestions and accident blackspots.For the weaving segment with limited conditions,it is more important to take traffic organization optimization measures to alleviate congestion.Taking the weaving segment of the North-South Elevated Expressway(from the on-ramp of Beijing West Road to the off-ramp of Weihai Road)as an example,based on the characteristics and problem analysis,some traffic flow directions are restricted and the interweaving flow is simplified,the ground road network shares the bypass flow,or disperse it to other entrances to re-enter the expressway system.The traffic simulation tool is used for evaluation and comparison.The solution methods can provide reference to improvement traffic efficiency for other weaving segments.