基于交通冲突技术的无信号控制T型交叉口安全评价  

Safety evaluation of unsignalized T-intersection based on traffic conflict technology

作　　者：杨紫龙 钱勇生[1] 曾俊伟[1] 魏谞婷 YANG Zilong;QIAN Yongsheng;ZENG Junwei;WEI Xuting(School of Traffic and Transportation,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学交通运输学院,甘肃兰州730070

出　　处：《青海交通科技》2024年第5期22-26,共5页Qinghai Transportation Science and Technology

摘　　要：为了更合理地评价城市无信号控制T型交叉口的交通安全性能,基于交通冲突技术,结合模糊综合评价法对其进行安全评价。首先,选定T型交叉口,获取实际状态下的交通流数据,并用以标定VISSIM仿真模型中的参数。然后,使用上述仿真模型模拟交叉口交通运行状态,用以获取交叉口交通运行轨迹数据,再使用SSAM软件在这些数据中提取出安全评价时所需的交通冲突数据。最后,结合模糊综合评估法对城市无信号控制T型交叉口交通安全进行评价。结合实例分析,采用上述方法能够更精确地评估城市无信号控制T型交叉口在不同交通流状态下的安全性。In order to evaluate the traffic safety of urban unsignalized T-intersection more reasonably,this paper evaluates the traffic safety of urban unsignalized T-intersection based on traffic conflict technology and fuzzy comprehensive evaluation method.Firstly,the traffic flow data in the actual state is obtained at the selected inter-section to calibrate the VISSIM simulation model required for the experiment.Then,the above traffic simulation model is used to simulate the intersection traffic operation state to obtain the intersection traffic operation trajecto-ry data,and then SSAM is used to extract the traffic conflict data required for safety evaluation in the traffic oper-ation trajectory data.Finally,combined with the fuzzy comprehensive evaluation method,the traffic safety of the urban T-intersection without signal control was evaluated.After case analysis,it is concluded that the above method can more accurately evaluate the traffic safety of urban unsignalized T-intersection under different traffic flow conditions.

关 键 词：交通冲突技术 交通安全评价 仿真技术 无信号控制T型交叉口 模糊综合评价法 

分 类 号：U491.3[交通运输工程—交通运输规划与管理]