The Operating Speed Prediction And Coordination Evaluation Of Extra-Long Underwater Tunnels Based On VISSIM

With the rapid development of tunnel engineering construction in China,the new design of cross-sea channel can be applied and realized,which build extra-long underwater tunnel instead of the traditional oversized bridge.However,at present,the research on extralong underwater tunnels usually pay more attention to the construction field,and there is only a little research on the traffic operation field.Therefore,based on the “Specifications for Highway Safety Audit”(JTG B05-2015),this thesis may use three ways(including theoretical model,regression model and traffic simulation model)to study on the vehicles operating speed under the environment of each road type of the extra-long underwater tunnels,which mainly include these following research results:(1)Analyze and summarize the construction methods and characteristics of extra-long underwater tunnels,which also analyze and research the specialties of vehicle operation and driver characteristics in the tunnel.(2)Analyze the traffic operating characteristics under extra-long underwater tunnel based on the design theory and method of operating speed.And then build the five road types’ model of the minimum speed prediction in the reference with the norms and theories.Finally,give the coordination evaluating method of the operating speed in tunnels.(3)Set up the road simulation model of a certain extra-long underwater tunnel instance by using VISSIM.Then compare the obtained simulated vehicle speed with the prediction of operating speed.In the end,give the linear evaluation results and analysis from the point of operating speed in extra-long underwater tunnels.