| With the rapid development of the automobile industry,people’s lives are becoming more and more convenient.However,the rapid growth of car ownership has brought a series of problems such as traffic congestion and traffic safety.In the urban signal intersection area,since the driver cannot judge the status of the signal light in time,he may accelerate,decelerate or idle for a long time,which causes the problem of large delay and low traffic efficiency.In recent years,with the rapid development of wireless communication technology and information technology,our country is entering the era of the Internet of Everything,at the same time,the road traffic system is also entering the era of Internet of Vehicles.At present,Vehicle-Infrastructure Cooperative technology is gradually becoming an important means to solve the problem of traffic safety and improve traffic efficiency.Therefore,this paper conducts a research on the simulation and test evaluation of the Vehicle-Infrastructure Cooperative System.The main work of the paper is as follows:(1)By analyzing the characteristics of vehicles at signalized intersections,and using information such as the speed of the target vehicle,the distance from the target vehicle to the stop line,and the signal phase,this paper proposed a set of speed-guided traffic strategies at signalized intersections under the vehicle-infrastructure cooperative environment.At the same time,a twostage S-shaped acceleration and deceleration algorithm was introduced to smoothly transition the vehicle speed,reduce the discomfort caused by sudden changes in speed,and improve the traffic efficiency.(2)In this paper,the simulation scene was built in Pre Scan,the control algorithm was written in Simulink,and the simulation experiment of speed guidance was carried out to obtain the target vehicle’s passing time and number of stops,and then compared them with the vehicle without speed guidance.The case study shows that for vehicles with speed guidance,the passage time is reduced by 26.5% and the number of stops is reduced by 48.0%.(3)Based on the principles of scientificity,systematicness,comparability,quantification,and typicality,this paper established a set of evaluation index system for the Vehicle-Infrastructure Cooperative System by studying and analyzing the system function,system adaptability and application scenarios of the Vehicle-Infrastructure Cooperative System.This system includes 5primary indicators and 21 secondary indicators.In addition,the method combining AHP and fuzzy comprehensive evaluation was proposed to evaluate and analyze the Vehicle-Infrastructure Cooperative System.(4)In this paper,a real vehicle experiment system of Vehicle-Infrastructure Cooperative System was built,and the scene tests such as vehicle collision warning,vehicle-infrastructure service information prompt,vehicle state recognition and warning were carried out.Finally,according to the comprehensive evaluation index system of Vehicle-Infrastructure Cooperative System constructed in this paper,the system was evaluated,and the evaluation result was general,which was consistent with the expected result.To sum up,the method we proposed in this paper has certain reference significance for the development and promotion of future Vehicle-Infrastructure Cooperative System. |
