Research On Traffic Flow Characteristics Of Un-signalized T-intersections Based On Cellular Automata

The intersection is not only the node of the traffic,the bottleneck restricting the traffic operation,but also the traffic accident.The un-signalized T-intersections as a common intersection,its non-mandatory driving behavior makes the intersection's efficiency and safety concerns.At present,there are few researches on the characteristics of traffic flow in un-signalized T-intersections,and lack of overall evaluation of the indicators.Firstly,construct the cellular automata model.Through the observation of various un-signalized T-intersections,the paper chooses the typical intersection,and uses video and other methods to collect data.Analyze the data,find out the main problems of such intersections,and analyze the internal mechanism of the main road straight and the left turn of the vehicle to find out the rules of its operation.The simulation system of the un-signalized T-intersections is constructed by using the cellular automata model and the actual rules.Secondly,the paper continues to emulate.From the local and overall point of view,analysis of the intersection of traffic flow characteristics.Paper discusses the influence of the road delay and conflict under the change of the main and branch flow;Studies the impact of the left driving behavior of the tributary vehicle and its changes on traffic safety and traffic efficiency;Grasps the relationship between the operation status of the intersection and the index,and puts forward some methods to improve the behavior of the traffic at the intersection.Finally,the theory of order degree of un-signalized T-intersections is proposed.Under the simulation,the idea of order degree is put forward.The mathematical model of the traffic flow in the parking,conflict,delay and other aspects of the operation of the mathematical model.It is of great practical significance to guide the planning,design,management and control of this type of intersection.