Research On Micro-traffic Simulation Modeling Of Mixed Traffic Flow

With the rapid development of urban traffic,it is convenient for people to travel,but traffic congestion is becoming more and more serious.The microscopic traffic simulation system simulates the traffic operation state by establishing road network model and vehicle behavior model,and quantifies the overall traffic operation efficiency through the vehicle operation in the simulation process,which provides an experimental platform for the related research of traffic prediction,guidance and traffic signal control.One of the major characteristics of China’s urban traffic is mixed traffic,with a variety of ways for residents to travel.Many scholars in the field of traffic simulation have done some research,used some models,made a thorough discussion and Research on various algorithms in traffic flow simulation,and obtained many practical and theoretical results,which laid the foundation for my further rese./arch.Foreign experts have established many excellent models according to the characteristics of traffic flow in our country,but they are not suitable for the characteristics of traffic flow in our country.Therefore,according to the characteristics of special traffic flow in our country,this thesis improves the existing models to make them suitable for the characteristics of mixed traffic flow in our country.The main contents of this thesis are as follows:(1)A hybrid road network model is proposed.Vehicle traffic flow has the characteristics of following,changing lanes,accelerating and decelerating.It is suitable for the continuous road network model of lane-splitting.The road network is composed of nodes and roads.Non-motorized vehicles have the characteristics of swaying,unstable and arbitrary routes.Pedestrians have the characteristics of multiple people moving together and unstable routes.Therefore,non-motorized vehicles and pedestrians are not suitable for the road network model of motor vehicles.They are suitable for discrete models.Cellular automata model can be used to describe their characteristics.I synthesize the advantages of the two models,and establish a mixed road network model to describe the characteristics of mixed traffic flow.(2)This thesis divides the modeling of mixed traffic flow into two scenarios,one is mixed traffic flow on non-motorized lanes and the other is mixed traffic flow on sidewalks at intersections under four-phase traffic lights.In the first scenario,the mixed traffic flow of non-driveway is modeled,and then the simulation experiments are carried out.The effects of diffusion probability,lane change probability and mixed proportion on the traffic flow are reflected.Finally,the actual sections are selected for data acquisition and compared with the simulation results.In the second scenario,the mixed traffic flow on the crosswalk at the intersection is modeled,and the pedestrian capacity,conflict times and conflict time are studied by simulation experiments.(3)A hybrid traffic flow simulation system architecture is proposed,and a solution to key technologies is proposed,and a simulation system is implemented.