| Under the context of rapid development of the Internet of Vehicles and Vehicle-road collaboration system,active traffic management(ATM)becoming the mainstream means of road traffic control and developing towards refinement.Therefore,how to apply the lane-level dynamic management control strategy to the intelligent vehicle-road cooperative scenario of smart expressway to improve the traffic efficiency and safety of the road,effectively alleviate traffic congestion and reduce traffic accidents caused by road unavailability has become a new consensus in the industry.The main research work of this thesis can be summarized as follows: Taking the local unavailability scenario of multi-lane expressway as the research object,the lane-level intelligent control strategy is simulated and evaluated.Combined with the traffic flow characteristics of the local unavailability section,the lane change pressure is used to simulate the traffic flow characteristics of the lane unavailability area.By fuzzing the lane change rules,a lane-level vehicle guidance control model under the lane unavailability scenario is built.Through the analysis and processing of the actual traffic flow data,the lane-level lane change control model under different lane unavailability scenarios in mixed flow scenarios is built based on MATLAB software.By simulating the running state of the mixed vehicle under the condition of multi-lane local unavailability and lane control,the lane-level control and static road control strategies of different combination lane change tips are compared and evaluated.Taking the road traffic efficiency and safety as the index,the optimal lane-level lane change position under multi-lane unavailability is obtained.The research conclusions show that:(1)The simulation framework proposed in this paper has good feasibility and higher simulation accuracy when simulating the lane-level lanechanging decision-making process of vehicles in unavailability scenarios.The establishment of this model provides a model basis for analyzing the impact of lane-level vehicle change-toguidance strategy on highway traffic flow.(2)In the multi-lane highway unavailability scenario: if the lane unavailability occurs in the middle lane,the vehicle should be prompted to change lanes in advance,and the distance is about 100 meters.When there is a lane unavailability in the left lane and the right lane,it is better to change lanes around 250 meters.The lane change distance should be based on the actual traffic conditions.The combination of different lanes in the range of 100-300 meters can save about 20-30 seconds of congestion time.(3)The effect measurement of lane-level control is constantly being studied and deepened.However,compared with static road control measures,lane-level coordinated guidance control measures can effectively improve road operation efficiency and safety.The conclusion of this paper can provide some reference for lane-level active control management,and improve the traffic capacity,service level and fine management level of road network to a certain extent. |
