基于需求的城市快速线形路段入口匝道协调控制研究

Coordination Control Research of on-Ramp for Urban Expressways Linear Section Based on Demands

针对城市快速线形路段特点,必须对入口匝道进行控制才能解决交通拥堵问题.基于需求的定义,把匝道入口处的车辆分为3个等级.采用基于交通需求的起始-到达模型,让具有城市快速路优先使用权的车辆驶入,达到保证优先级别高的车辆先行,使城市快速路运行在最优状态.计算了一段包括4个出入口的4车道城市快速线形路段在某一天08:30～10:00时间段的入口匝道调节率和相对路段的交通量,同时得到等级较低的车辆需要绕行的数量.

At present, there are some urgent traffic problems about urban expressway system which need to be solved in China, such as usual traffic jams. Controlling on-ramp to solve these problems is pointed out according to urban expressway linear section characteristic. Vehicles of on--ramp are divided into three grades based on demand. Introducing O-D model based on traffic demands, vehicles with higher priority are permited into the urban expressway to guarantee vehicles with high grade entering first and to make sure urban expressway being operated optimally. On-ramp regulation rate , traffic on relative section and circuitous vehicle quantities with lower grade are caculated on some day 8：30-10：00 for four-roadway urban expressway linear section including four passageway.