交叉口环境下的智能网联汽车危险状态研究
2017-05-16薛晓卿宋娟周唯何承坤
薛晓卿++宋娟++周唯++何承坤
摘 要:道路交叉口的交通安全问题是世界各国面临的共同难题。车联网和智能网联驾驶汽车技术的飞速发展为解决交通安全问题提供了新的机会。本文旨在通过分析车联网环境下车辆简化模型和事故冲突类型,以碰撞时间(Time to Collision)为评价指标,建立时空冲突结合的智能网联汽车危险状态表示方法,通过设置修正系数改正模型,并且利用仿真模型对修正前后的结果进行对比,结果表明修正后的模型对车辆危险状态的表示更加符合实际情况。
关键词:智能网联;交叉口;时空冲突;危险状态
中图分类号:U491.23 文献标识码:A 文章编号:1671-2064(2017)07-0020-04
Abstract:Intersection traffic safety issues are common problems in the world. The sharping development of Internet of Vehicle and Intelligent Connected Vehicle provided a brand-new technology to solve traffic safety problems. A viable model was proposed to depict the risk status of vehicles at the intersections. Simplified model was analyzed and accident condition categories of connected vehicles with wireless networks to build the system of evaluating indicator with Time to Collision. Moreover, a method was proposed to describe the temporal-spatial conflict by setting the correction parameter. What's more, comparing the simulation models on amendment before and after which shows the amendment one is more correspond to the reality dangerous state of vehicles at the intersection.
Key words:Intelligent and Connected; Intersection; Temporal-spatial conflict; Risk status
1 研究背景
道路交叉口的交通安全問题是世界各国面临的共同难题。针对交叉口安全问题的研究主要集中于人、车、路、环境等交通影响因素及其与交通事故的关系分析方面,并以此为依据改善道路设计、加强交通管控措施等,或者在车辆上安装主被动型安全装置来提高行车安全,但这些传统的道路设计、交通控制和管理技术只能在一定程度上减少交通流的冲突数或降低冲突的严重程度,并不能有效的防止交通事故的发生,无法达到交叉口安全效益最优,更难以从本质上解决交通问题。尤其是对于无信号灯控制的交叉口,虽然国家有一部分针对无信号灯控制交叉口的让行通过的法律法规,但在复杂的交通环境下,无信号灯控制的交叉口仍呈现无序状态,其安全水平低于有信号灯控制交叉口。……
