Study on the collaborative control method of freeway entrance and exit and adjacent urban roads
Aiming to solve the problem of regional traffic congestion caused by excessive traf-fic demand and uneven distribution of traffic load during peak time,the collaborative control method of freeway entrance and exit and adjacent urban roads is studied.Firstly,after stud-ying the relationship between the traffic demand and the traffic capacity from node to node in the area of freeway entrance and exit,a collaborative traffic control model of freeway en-trance and exit is constructed,taking the maximum traffic volume of toll station and its con-necting intersection as the control target.Secondly,after studying the relationship between the traffic demand and the traffic capacity from each boundary node of the urban road region to the freeway entrance and exit,a traffic signal coordination control model of urban section is constructed,combined with the idea of red wave coordination control.Finally,taking Shi-bu Freeway in Nanning City and its surrounding areas as examples,the validity and feasibili-ty of the method were verified by carrying out VISSIM simulation experiments.The simula-tion results show that although the traffic load of the boundary nodes on the coordination ar-ea has increased,the average queue length and the average delay at the freeway entrance and exit cohesion nodes are reduced by 22.36%and 13.10%respectively,and the total average queue length at other nodes is reduced by 18.54%.From the perspective of regional road network,the simulation results show that the proposed method can effectively alleviate the regional traffic congestion of freeway entrance and exit and the surrounding areas.
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