Research on Traffic Organization at the Entrance and Exit of Urban Tunnel

At present,at entrance section and exit section of many urban tunnels the traffic organization is disordered,and the traffic capacity is low,which is a problem that should be solved for urban tunnel construction and management.From the traffic congestion actualities of entrance and exit section of urban tunnel,the presented paper brings forward the principles to follow for traffic organization design at entrance and exit of urban tunnel,and puts forward the guidance ideas to lead how to lay out the entrance and exit,and furthermore,it puts forward different traffic organization styles according to different link styles between the primary entrance and exit and adjacent crossing such as intersection,T crossing and upright T crossing.Based on traffic flow characteristic,the presented paper brings forward the traffic organization at merging and diverging areas.Research on traffic organization in the presented paper will provide important technology support for urban tunnel planning,design and management.