上海市近年来建成的“申”字形高架快速路网,对疏解中心城区的交通紧张局面、提高运输效益起到了积极作用。但在建成若干年后,部分路段就出现了交通拥塞现象,部分立交匝道合流处及立交附近主线本身的饱和度已超过1,拥塞现象十分严重。以东西高架路与南北高架路的北交叉点延安路 The “Shen” shaped elevated expressway network built in Shanghai in recent years has played a positive role in easing traffic tension in the central urban area and improving transportation efficiency. However, after some years of construction, traffic congestion occurred on some sections of the road. The saturation of some of the interchanges at the interchanges and the main line near the interchanges exceeded 1, causing congestion to be very serious. Yan’an Road, the northern intersection of the Elevated Road and the North-South Elevated Road