关键词: 城市交通, 拥塞疏导优化模型, 双层规划理论, 城市交通拥塞, 交通小区划分, 关联度

Abstract: This paper focuses on the traffic zoning and traffic congestion optimization in urban road network under regional signal control. The factors that determines the traffic zones under congestions are identified and a model is proposed to describe the correlation degree of adjacent intersections. The congestion control sub-area is divided into “evacuation zone”and“balance zone”. Considering the different optimization objectives for“evacuation zone”and “balance zone”, the paper develops a bi-level optimal programming model for urban road network congestion mitigation. Taking some part of the road networks in Kunming city as an example, the paper compares the effectiveness of the actual control scheme and the proposed model through simulations. The results show that the proposed model performs well in the congestion control, except two optimization schemes on the average number of stops. The average vehicle delay time is reduced by 7.7 s, the proportion of severely congested mileage is reduced by 10.1% , and the vehicle occupancy in the network decreases 14.1%. The model has good effectiveness and can provide references for road network traffic congestion zoning and mitigation.

Key words: urban traffic, congestion mitigation and optimization model, bi-level programming, urban traffic congestion, traffic zoning, correlation degree