基于交通冲突的互通立交交织区交通安全研究

Traffic Safety in Interchange Intertwined Area Based on Traffic Conflict

高速公路互通立交具有快速化、大流量、多方向交通转换的功能,是高速公路运行高效安全的关键节点。以互通立交交织区为研究基础,通过无人机采集交织区交通流量、速度等基础数据,使用调查数据进行VISSIM仿真模型参数标定,并仿真得出交织区交通流轨迹数据,利用SSAM软件提取道路交通冲突数据;最后通过分析道路仿真数据,提出互通立交安全提升改造措施。

The expressway interchanges have functions of rapid, large flow, and multi-directional traffic conversion, which is the key to expressway operation efficiency and safety. This paper collected traffic volume, speed, and other basic investigation data in the interchange intertwined area via UVA to calibrate the parameters of the VISSIM simulation model and simulate the traffic volume trajectory data in the intertwined area. The traffic conflict data were extracted by SSAM software. Finally, the traffic simulation data were analyzed, so as to propose the interchange safety upgrading and transformation measures.