城市干线双向绿波控制优化设计

Bidirectional Green-Wave Signal Control Optimization Design of City Trunk Road

给出了一种实现双向绿波信号控制的改进图解法。通过交通调查先确定带速度和周期,再协调控制系统的相位差。与传统的图解法相比,改进的图解法可以根据实际的交通需求实现双向不同带宽需求的绿波协调控制,适用于进口对称放行方式和进口单独放行方式,同时也适用于双向流量不均衡、交叉口已存在排队车辆、车速变化等道路情况。实例验证结果表明:利用改进图解法设计的双向绿波可有效提高干线道路的通行率,缓解交通拥堵情况。

A kind of bidirectional green-wave signal control method which is an advanced graphic method was proposed. It identified belt speed and cycle by traffic survey data firstly, and then coordi- nated signal offset of control system. Compared with the traditional graphic method, it can realize bi- directional green-wave signal control of different bandwidths according to the actual traffic demand. This method not only can be applied to the mode of symmetrical green light but also is effective in the signal design mode of one-phase-one-approach. It also can be applied to the imbalance flow between the two-way, intersection queuing vehicles and speed change. The accuracy and applicability of the improved graphic method were illustrated by an example. Finally, through the example validating, the results show that the bidirectional green-wave signal control designed by the advanced graphic method can effectively improve the trunk road traffic and alleviate urban traffic jam.