一、概述由于受资金、技术水平、历史状况等许多客观条件的影响,城市道路新建或改建的进度,远远落后于各种车辆增长速度。因此,交通拥挤、堵塞、事故、公害等问题,就不可避免地增多。随着我国四个现代化的发展,若不采取相应措施,这些问题将会日趋严重,它将直接阻碍“四化”的进程,也将日益危及城市人民的正常活动。实践证明,实现交通管理现代化,采取交通指挥自动化措施,充分发挥现有道路的作 I. Overview Due to the influence of many objective conditions such as capital, technical level and historical conditions, the pace of new or reconstructed urban roads lags far behind the growth rates of various vehicles. Therefore, traffic congestion, congestion, accidents, public hazards and other issues inevitably increase. With the four modernizations in our country, these problems will become increasingly serious without appropriate measures. It will directly hinder the process of the “four modernizations,” and will increasingly endanger the normal activities of urban people. Practice has proved that the realization of traffic management modernization, take traffic command automation measures, give full play to the existing road for