关键词: 主干道, 控制子区, 韦伯斯特周期公式, 支路相位排前可行度函数, 相序优化

Abstract: Aiming at the traffic trunk road coordination control of phase conflict problems, a kind of dynamic coordination control method for trunk road is proposed. First of all, trunk road is divided into several control subareas by calculating correlation intersection. Then this paper calculates all control parameters, including control subarea parameter and coordination parameter between two control subareas. In this part, the formula of Webster cycle is modified, in view of the city traffic flow characteristics. At the same time, a branch phase top feasible degree function is designed, which is used for optimizing each intersection phase sequence. Above all, the cycle time of control subarea, the green ratio of every intersection, the phase sequence of every intersection and guide speed of every road section can be calculated according to the traffic information on a period of time. Finally, simulation study shows that, this method can effectively reduce the access time of trunk road than the decentralized control.

Key words: trunk road, control subarea, Webster cycle formula, branch phase top feasible degree function, phase sequence optimization