Study On Intersection Vehicle Access Method Based On Cooperative Vehicle Infrastructure System

The development of intelligent transportation technology has brought a lot of convenience to people's travel,with the development of communication technology,sensor technology and other advanced technology vehicles,vehicle road information interaction become more real-time,efficient,making the car road collaborative system has become a hot topic in the research of intelligent transportation.For the road traffic system,the intersection is the "throat" of the city road network,how to use the Cooperative Vehicle Infrastructure technology to achieve the intersection of safe and efficient traffic is also the road technology research focus.Compared to the actual operation of vehicles and traffic infrastructure without information interaction,the biggest feature of the roadway coordination system is the possibility of providing interaction between vehicle-road and vehicle-to-vehicle operation and control information.In view of this change,this paper aims to ensure the traffic efficiency of the vehicle at the intersection by aiming at the safety of traffic and traffic conflict resolution intersection.The main research work is as follows:Firstly,this paper set up the framework of the intersection coordination system based on Cooperative Vehicle Infrastructure technology.The intelligent vehicle system,the intelligent roadside system and the communication protocol and strategy are analyzed.The conflict between the motor vehicles in the common intersection is analyzed,and considering the braking distance of the vehicle,the delay caused by communication and human response,the triggering distance of the intersection control model is calculated.Considering the influence of the multi-vehicle movement state on the follow-up behavior before and after the driving process,the whole speed difference model is put forward Improved full speed difference model.Secondly,in order to improve the efficiency of traffic intersection,It considered the intersection of the size of the flow,and designed two kinds of vehicle traffic flow method: according to the situation about the flow of small,designed with the total intersection delay optimization model of vehicle speed guidance,and deceleration control,the vehicle can not stop at the " alternate" through the intersection.For larger flow,to the intersection of existing timing method based on optimization design using traffic signal control method of "Virtual signal control" of stop and go traffic method type.Finally,a vehicle simulation platform based on Q-Paramics and VC ++ i s proposed.The programming of the model established above is realized by VC ++.The control of the vehicle is realized by Q-Paramics API interface.The validity of the improved model and the intersection control model proposed in this paper is verified.