基于功效系数法的交叉口黄色闪烁警示灯有效性评估

为解决黄色闪烁警示灯有效性量化评估的问题,提高交叉口的综合运行水平,减少交通事故的发生.针对3种不同类型交叉口黄色闪烁警示灯的综合评估问题,提出了基于驾驶模拟技术的评价方法,实现以微观驾驶行为数据结合基于熵权的功效系数法对黄色闪烁警示灯进行有效性综合评价.以国道101部分路段为背景搭建T形、十字形、畸形3种类型交叉口国标组和专项组的模拟驾驶实验场景,采用驾驶模拟实验方法,从3个层面选取8项评价指标,进行综合评估.结果表明,同类型交叉口设置黄色闪烁警示灯后其总功效均显著性提高,交叉口的安全性、舒适性及预见性水平得到提高.功效系数法能够科学合理的实现方案间的相互对比,具有较强的实用性,为黄色闪烁警示灯的设置提供理论依据. 

An Effective Evaluation of Yellow Flashing Warning Light of Intersection Based on an Efficiency Coefficient Method

In order to solve issues of quantitative assessment of the effectiveness of yellow flashing warning lights,improve comprehensive operation level of intersections,and reduce occurrence of traffic accidents,an evaluation method based on driving simulation technology is developed to evaluate yellow flashing warning lights in three different types of intersections.The effectiveness of them is comprehensively evaluated by combining microscopic driving behavior data with an efficiency coefficient method based on entropy weight.Based on actual scenes in T-intersections,cross-intersections and abnormal intersections of a partial roadway on G101 national highway,two kinds of virtual scenarios are developed,which are named as the national standard group and the special group.Eight evaluation indicators are selected from three aspects.The results show that the total effectiveness of the same type of intersections can be significantly improved after set up a yellow flashing warning light.The level of safety,comfort,and predictability at the intersections are improved.An efficacy coefficient method can scientifically and reasonably achieve the mutual contrast between alternative programs which has strong practicability,and provides a theoretical basis for setting the yellow flashing warning light.