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.