Spatiotemporal Optimization Design of Intersections Between Expressway and Freeway
In response to the problem of limited throughput at downstream intersections of expressways,which leads to long queues and overflow to the exit ramp,affecting the main traffic flow of expressways and even the normal operation of freeway and expressway system.This article takes the intersection of Qingyang Road and Hehai Road in Changzhou City,which connects expressway and freeway,as an example.Based on the characteristics of such intersections,the operational status,flow rate at different periods,and causes of normalized congestion are analyzed.Two spatiotemporal optimization schemes are proposed for this intersection,taking into account both efficiency and safety.Finally,the two optimization schemes are discussed through VISSIM simulation.From a technical perspective,the optimization effect of Plan 2 is better;From an economic perspective,the renovation cost of Plan 1 is lower.
Connecting intersectionFreeway and expressway systemSpatiotemporal optimizationTraffic simulation
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