基于VANET环境高速公路车辆换道安全车距研究

Research on Safety Distance between Lane- changing Vehicles on Expressways Based on the VANET Environment

高速公路具有车速快、车辆多的特点,由于车辆换道发生追尾的交通事故,造成的经济损失较为惨重。本文基于VANET环境,在典型的换道场景中,利用V2V通信的技术,根据汽车动力学原理,通过对换道的4个阶段的分析研究,提出了车辆从本车道变换到目标车道,与目标车道的前车应保持的换道安全车距模型,最后在NCTUNS网络仿真软件下建立了仿真实验环境。实验结果表明,换道安全车距模型是正确的,具有较好的实用性,可为汽车自动驾驶、辅助驾驶或预警系统的应用奠定基础。

Fast and crowded,vehicles on expressways easily run into each other when changing lanes,resulting in huge losses. This paper presents a research based on the VANET environment where the V2 V communication technology is employed to analyze the four stages of a typical lance changing operation to suggest a safety distance model for a vehicle attempting to change from the current lane to the destination one according to theories of vehicle dynamics. Finally,a simulation experimental environment is set up with the help of the network simulation tool – NCTUNS. Results of the experiment show that the model of safety distance for lane changing vehicles is workable and practical and can thus be applied to automatic drive,assisted drive and the collision warning systems of vehicles.