To solve the traffic congestion and safety problems caused by the complex traffic flow at urban multi way intersections,the characteristics of the"Cai"shaped intersection in multi way intersections are clarified,and the necessity of prohibiting traffic flow at some intersections was analyzed.A traffic organization model was constructed for prohibited traffic flow at intersections based on bilevel programming.With the goal of minimi-zing the average travel time of vehicles in the local road network,it was determined whether the traffic flow in each direction of the intersection is prohibited,and a traffic organization plan for the backward direction of the prohibited flow to reduce the number of traffic flow and conflict points within the intersection was determined.Taking the intersection of Xuefu Road and Xidazhi Street in Harbin as an example,a comparison was made between the no flow traffic organization plan and the one-way traffic organization plan.It is found that the no flow traffic organization at this intersection is better,with a 52％reduction in the number of conflict points and a 0.98％decrease in the average travel time of vehicles on the road network.Considering the analysis of traffic volume changes,it is found that the applicability of the no flow traffic organization model is poor when the OD volume changes by more than 26％.For intersections with obvious tidal phenomena,one-way traffic organiza-tion should be set up.
multi-way intersectionorganization of traffic prohibitionlocal road networkstraffic operation efficiency
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