Traffic Flow System For Regional Roads And Intersections

In order to alleviate traffic congestion in some areas of the city,the uneven utilization of road resources,this paper designs a traffic flow control system.When congestion occurs at a level intersection,reasonably control the signal light transition time,and evacuate congested vehicles to nearby smooth roads.When regional roads are congested,use dynamic path guidance algorithm to plan dynamic path for driver in real time.Save time for drivers and achieve the purpose of evacuating traffic.The work of the article mainly includes the following aspects:1?Research the current traffic flow control system and analyze the system functional requirements.Design the overall control scheme of the traffic flow control system,including:traffic flow detection system for regional roads and intersections,traffic evacuation system at intersection,regional road traffic evacuation system and database design and system testing.2?Collect and process traffic flow in a certain area.Image processing of high-definition video images collected by intersection cameras.Get traffic information such as vehicle speed,vehicle space occupancy rate,license plate number,etc..Store the above data in a relational database.For traffic information data.To determine whether the intersection is congested,and used in path planning.3?When congestion occurs at a level intersection,set all traffic lights to red at the intersection.No new vehicles are driving in,avoiding further cross-winding of vehicles at intersections,making the vehicles staying at the intersection quickly exit,realizing the evacuation of the vehicles at the intersection.When the intersection vehicles are cleared,the traffic lights return to normal control mode.4?The evacuation of regional road vehicles is achieved by using a path guidance algorithm that combines the Markov model and the A*algorithm.Take an area of about 6km~2 prone to congestion as an example.Divide the area into a certain number of squares and assign values to the squares according to the difference in road conditions.The more congested the road,the higher the road resistance and the lower the recommendation index.According to real-time path planning,almost no vehicles enter the congested road,inducing vehicles to free-flowing roads,realizing the function of traffic evacuation.5?Database design.Mass data will be generated in the road condition information collection module.In order to facilitate management,first pre-process the data to filter out invalid data.Second,use the relational database MySql to create different data tables,used to store traffic information data.6?Finally,simulate the red light running time adaptive algorithm and path guidance algorithm.Experimental results show that the algorithm can speed up congestion removal.It saves the driver time and is reasonable.