Abstract: This paper introduces the mechanism of actuated signal control and
the method to determine main parameters，analyses the queuing model and the
delay model at urban road intersections，surveys the basic data of a typical four-leg signalized intersection in Beijing, simulates the present situation and the actuated signal controlled situation and compares the two results. The traffic status may be improved obviously in the later condition, the east entry control delay may decreasef rom 78.9s t o2 1.9s ，thew este ntryc ontrold elaym ayd ecreasef rom 144.Os t o4 5.9s ,t he average delay may decrease from 82. 8 seconds to 28. 3 seconds and the level of service may ascend from level F to C.

Key words: actuated signal control, signalized intersection, signal parameter, simulation model

摘要： 首先介绍了感应信号控制的机理及其主要参数的确定方法，分析了城市道路交叉口排队和延误的计算方法;在对北京市某一典型十字信控交叉口进行大量实际观测调查的基础上，运用Synchr。系统对交叉口现状和采用感应信号控制后的运行状况进行了仿真模拟对比分析.该交叉口采用感应信号控制后，东进口控制延误由78. 9s下降到21. 9s，西进口控制延误由144. Os下降到45. 9s，每车停车延误由原来的82.8s下降到28.3s，交叉口服务水平也由F级上升到C级，交叉口交通状况得到明显改善.

关键词: 感应信号控制, 信号交叉口, 信号参数, 仿真模型