关键词: 城市交通, 交通微循环, 双层规划模型, 开放街区, 遗传算法

Abstract:

Opening and using the internal high- density roads of urban blocks to design the microcirculatory traffic network can divert the traffic flow on main roads, reduce the traffic blind spots and alleviate the local traffic congestion. Taking all roads in the block as an optional road set, the bi- level planning model of optimizing microcirculation organization is set up with the aim of minimizing the ultra- limited saturation and the bypass distance of trip origin- destination. The optimal branch road reconstruction segment and the organization of the microcirculatory network in the region can be figured out by genetic algorithm. An example is provided to show that the traffic microcirculation organization in the open block could achieve the goal of minimizing the transformation cost and maximizing the traffic efficiency, and significantly reduce the saturation of traffic flow and the vehicle bypass distance.

Key words: urban traffic, traffic microcirculation, bi-level programming model, open block, genetic algorithm