Impact Analysis Of Countdown Signal On The Crossing Behavior Of Non-motor Vehicles

The countdown signal timer,as a way of traffic control method,is more and more popular.However,not enough effort is being done for the research on the impact analysis of countdown device,especially the impact on non-motor vehicles.The purpose of this paper is to enrich the study on how the countdown signal lights affect non-motor vehicles.The red light duration is divided into three sections in this study innovatively.The effect of the countdown signal on the non-motor vehicle in each period is studied in detail.We analyze the data collected to compare traffic behavior between two situations(with and without countdown signal).The effect of countdown on the crossing behavior is studied by statistical modeling.The main influencing factors of crossing behavior with or without countdown device are compared.The main content is followed:(1)Compared to pedestrians,the non-motorized irregularities are studied in the presence or absence of countdown.Non-motor vehicle violations are studied using a simple mathematical statistical method to process the collected data in the yellow light interval,intermediate stable interval and early start interval with or without countdown display,so do the subtle behaviors of the non-motorized riders.It was found that the countdown signal was effective in reducing pedestrian violation rates but not significant for non-motor vehicle violation rates in the entire red light interval.No matter in yellow light or in last 4s,countdown lights can significantly reduce pedestrian violation rate,but have no significant effect in the middle interval.However,the countdown lights have no significant impact on non-motor vehicles in all three sections.In addition,the samples under the countdown signal are more relaxing,and the effects of countdown for pedestrians and non-motor vehicle are slightly different.(2)The behavioral model was established using multiple Logit regression and two logit regression equations.The factors that affect the crossing behaviors are explored using the established model in the presence of countdown and not.The compliance,opportunism,adventurism behavior regardless of the early start behavior are studied.It shows that the countdown signals make the non-motor vehicles which cross in red light more likely to wait,and the waiting non-motor vehicle tends to be more compliant.The differences of early start behavior are compared too.In the contrast,countdown will significantly increase the non-motor vehicle early start behavior,resulting in a negative effect.In addition,the results also show that the influencing factors of crossing behavior in different intervals are not exactly the same with or without countdown.The impact factors of the behaviors with countdown timers are significantly less than the situation without countdown timers.(3)At last,the impact of the countdown on the waiting time of non-motor vehicles is studied.Compared with pedestrian,non-motor vehicle waiting time distribution rule is explored by survival analysis.The factors influencing the non-motor vehicle waiting time are considered using cox model in two situations that one removes early start behavior,the other just explore early start.Unlike the countdown signal can effectively increase the pedestrian waiting time,it has no significant effect on the overall waiting time for non-motor vehicles.The countdown has no significant effect on the waiting time for non-motor vehicles when the early start behavior is not considered.However,for early start samples,the countdown increases the risk of early start and reduces waiting time significantly.In addition,the impact of non-motor vehicle behavior factors is not exactly the same with or without countdown display.Also,the number of impact factors of the waiting time with countdown timers are significantly less than the situation without countdown timers.