基于交通安全的交叉口倒计时信号灯设置研究

交通信号倒计时装置被国内一些城市广泛采用。在体现交通“以人为本”原则的同时,倒计时装置的应用也应注意其带来了一些交通安全和通行效率上的问题。倒计时会诱发一部分驾驶员在绿灯末尾时加速通过路口,和红灯变绿灯下一相时头车提前高速到达冲突点,可能引发重特大交通事故,因而需要更长的绿灯间隔时间保证信号换相时的交通安全。由于绿灯间隔时间增长,交通信号倒计时装置降低了交叉口的通行能力,且不当的绿间隔设置还会造成严重的交通冲突。因而应谨慎采用机动车交通信号灯倒计时装置,并应辅以绿灯间隔时间调整、交通安全宣传教育和明确交通规则等措施。

Discussion on Setting Traffic Signals with Counting down Display Unit at Intersection Based on Traffic Safety

Traffic signals with count-down display unit have been wildly used reflecting human oriented principle; nevertheless, the inconsistency between traffic efficiency and safety should be taken into account, The driver would be seduced by the end of green signal to rush through the cross road and hit the first rushing vehicle from the taming point of the signal causing severe traffic accident at the intersection. In order to avoid this kind of accident, the interval of the tuming point needs to be prolonged. However, it would lower the crossing capacity, and improper setting of interval duration might cause serious traffic conflict. So, the timing signal should be set cautiously with the aid of other treasures such as adjusting the interval duration, propaganda of traffic safety and rules.