A Study of Hub Interchange Design on Dagengjia Five-direction Crossroads in Harbin

The Dagengjia node in Songbei New Area,Harbin,is a five-direction crossroads formed by National Highway No.202,Hada high-speed connecting line and the region roads.According to the traffic condition research,road network character analysis and the regional terrain its features,the reasonable interchange hub design plan and the express way directional double-herringbone-shaped viaduct mode are determined.Within the region,straight traffic is set up as tunnel separation and turning traffic is connected by ground roundabouts.The interchange project is of great rational traffic function,beautiful smooth interchange shape and normal suitable investment amount.