基于驾驶模拟实验的快速路交织区运行风险评价

Operation Risk Evaluation of Weaving Area of Expressway Based on the Driving Simulation

对快速路交织区运行风险进行有效评价可为交通组织优化设计与交通管控的实施提供依据。基于8自由度驾驶模拟仿真平台,建立16个场景模拟不同交织区长度、不同交通流密度、不同行驶路径的城市快速路交织区运行状况;基于20名驾驶员的实验数据,分析车辆运行状态特性,并提出快速路交织区运行风险评价指标;进一步分析运行风险评价指标与场景变量的关系,并给出运行风险等级划分标准。研究结果表明:高密度交通流场景下运行风险比低密度交通流场景增大50%;运行风险评价指标与交织区长度呈线性负相关关系,增大交织区长度有利于降低交织区的运行风险。

Effective operation risk evaluation of weaving areas of expressway can provide a basis for the optimization design for traffic organizations and the traffic control.Based on 8 degree of freedom driving simulation platform,16 simulation scenarios of urban expressway weaving area were made based on the variation of weaving area length,traffic flow density and driving path.Operation conditions of 20 samples were simulated in these simulation scenarios.The vehicle operation status characteristic was analyzed,then the operation risk evaluation index was proposed.At last,the grading method of risk evaluation index was proposed based on the relationship analysis between risk index of operation safety and scene variables.The research results show that the operating risk in the high-density traffic flow condition is 50%greater than that in the low-density traffic flow condition.Risk index of operation safety has a linear negative correlation with the length of the interlaced area.Increasing the length of the weaving area is beneficial to reduce the operational risk of the weaving area.