Research On Dynamic Control Of Separating Trucks From Passenger Cars Of Bidirectional Multi-lane Freeway

The percent of heavy trucks increases gradually in rencent years,and trucks become longer and heavier which aggravates the phenomenon that passenger cars travel with trucks together on freeway.Aming at this problem,we often use the static control of separating trucks from passenger cars at present,which is based on the historical data of road traffic to divide the passenger and truck lane.When the lane division is completed,it will not change with the traffic flow changes.The control method which is not based on the demand response only applies to simple traffic flow.However,the difference in traffic volume and traffic composition between different periods of time,such as normal times,weekends and holiday is very large in the road.Even the day and night on the same day,traffic composition is also obvious differences.With the rapid increase in traffic volume and the increasingly complex in traffic composition,static control of separating trucks from passenger cars will not meet the traffic demand.To solve the deficiencies and improve the capacity of freeway,this paper proposes dynamic control of separating trucks from passenger cars.First of all,based on the investigation of domestic and international methods of static control of separating trucks from passenger cars,this paper compares the static control and the dynamic control of separating trucks from passenger cars and put forward the problems of static control and the advantages of dynamic control.Secondly,based on the analyzing of the lane division principle of the dynamic control of separating trucks from passenger cars,this paper studies the basic parameters of lane division of the dynamic control of separating trucks from passenger cars and proposes a lane division method of bidirectional six-lane,eight-lane and ten-lane based on demand of lane number.Thirdly,this paper analyzes the impact factors of this speed from the road conditions,traffic conditions,weather conditions and human feelings.Then based on the fuzzy comprehensive evaluation method and the fuzzy reasoning theory,the speed limit model for dynamic control is proposed.Finally,based on the practice and investigation of domestic and international about urban tidal lane control,this paper researches the information gathering technology,information processing technology and information release technology to guarantee for the effective implementation of dynamic control of separating trucks from passenger cars.