Research On The Impact Of In-Vehicle Displaying On Driving Characteristics Under On-Road Traffic Lights Obstructed Environments

As automobile ownership continues to grow,traffic accidents are becoming more frequent,and the complexity of road environments is increasing,which poses higher demands on drivers’ driving skills and advanced driver assistance systems.To address these challenges,vehicle to everything(V2X)technology,which relies on road side units and on-board units,is considered an effective solution.In-vehicle traffic lights(IVTL)are a critical component of V2 X,allowing the display of signal phase and timing messages(SPAT)of on-road traffic lights(ORTL)in the vehicle.Therefore,IVTL technology can extend the range for drivers to obtain SPAT and provide new solutions for ORTL obstructed environments.The study fouses on the impact of deploying IVTL on driving characteristics,especially in obstructed environments,such as foggy weather and ORTL blocked by a large vehicle.In addition,different deployment conditions of IVTL are considered,which aligns with the application process of IVTL and can support the application of IVTL technology.This article covers four main research topics:(1)During the discussion,the research and development status of advanced driver assistance system,V2 X and IVTL were thoroughly examined,with a particular focus on the applicability of IVTL.To gain insight into the traffic flow perspective,traffic operation strategies for IVTL vehicles were optimized.The traffic flow simulation results exhibited that with an increase in IVTL vehicle penetration rate,there was an improvement in driving safety,maneuverability,and fuel efficiency.Overall,the results demonstrated that largely composed of IVTL vehicles,especially the penetration rate reached above 50%,could significantly improve driving characteristics of traffic flow.(2)Considering the challenges associated with large-scale deployment of IVTL,the different deployment conditions of IVTL in dual-vehicles were explored.The following distance models were established.The influencing factors on driving characteristic of dual-vehicles were understood and then the evaluation indicators were determined.A hardware-in-the-loop simulation platform was built using Pre Scan-Matlab/Simulink joint simulation software and the Logitech G29 device.Driving simulator experiments were conducted in scenarios of sunny,foggy and ORTL obscured by a large vehicle.The results showed that even if only one vehicle equipped with IVTL,positive effects on the driving characteristics of dual-vehicles could be observed.(3)To ensure the feasibility of the scenario on actual road,the scenario of ORTL blocked by a large vehicle was selected for detailed study.Based on the theory of vehicle braking,the mechanism of the scenario was conducted by considering two moments of ORTL turning red and green.The theoretical analysis indicated that the obstruction of the large vehicle in front might cause the following small vehicles to run red lights and rear-end accidents.Considering the basic characteristics of ORTL obstructed by a large vehicle and the driving characteristics of a large vehicle passing through the intersection,the controller conformed to the characteristics was designed.Based on the IVTL simulation experimental platform,the driving simulator experiment was conducted,and heart rate data of drivers were included in the evaluation scope.The experimental results indicated that the deployment of IVTL in the scenario could eliminate the adverse effects of the large vehicle obstruction and improve driving characteristics.(4)To verify the reliability of the driving simulator experiments under the scenario of ORTL obstructed by a large vehicle,the actual road environments were conducted.A mobile traffic light was transformed using internet of things technology,enabling the functionality of receiving SPAT through an Android smartphone application.Additionally,vehicle data collection and download were implemented based on sensors of the smartphones.Ultimately,the trends of results between the actual road experiments and driving simulator experiments were consistent,indicating good consistency.Therefore,the feasibility of driving simulator experiments as an essential preparation before actual road experiments was confirmed.