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交叉口是城市干道重要的组成部分,干道的通行能力主要是由关键交叉口的通行能力决定的。解决交叉口的交通冲突,就理论方面分析有两种方法:一是空间分离,如渠化、立交等;二为时间分离,如信号控制法、多路停车法及让路法等。交通信号的作用是从时间上将相互冲突的交通流予以分离,使其在不同时间通过,以保证行车安全,同时交通信号对于组织、指挥和控制交通流的流向、流量、流速以及维护交通秩序等均有重要的作用。
Intersections are an important part of an urban thoroughfare. The capacity of a trunk road is primarily determined by the capacity of the intersection. To solve the traffic conflicts at the intersection, there are two ways to analyze the theoretical aspects: one is spatial separation, such as canalization and interchange; the other is time separation, such as signal control, multi-lane parking and let-go. The function of traffic signal is to separate conflicting traffic flow from time to time and ensure traffic safety at the same time. Traffic signals can also be used to organize, command and control traffic flow, flow rate, flow rate and maintain traffic order Etc. have an important role.