[论文解读] A Cooperative Freeway Merge Assistance System using Connected Vehicles

Salman Ahmed, Mohammad A. Hoque+2 more|arXiv (Cornell University)|Apr 29, 2018

Vehicular Ad Hoc Networks (VANETs)参考文献 5被引用 9

一句话总结

本文提出了一种基于V2X的协同高速公路汇入辅助系统，利用联网车辆减少汇入冲突、交通拥堵和燃油消耗。该系统通过DSRC实现三路握手协议，协调汇入车辆与主路车辆的行驶，借助实时驾驶建议信息提升安全性和效率。

ABSTRACT

The rapid growth of traffic-related fatalities and injuries around the world including developed countries has drawn researchers' attention for conducting research on automated highway systems to improve road safety over the past few years. In addition, fuel expenses due to traffic congestion in the U.S. translate to billions of dollars annually. These issues are motivating researchers across many disciplines to develop strategies to implement automation in transportation. The advent of connected-vehicle (CV) technology has added a new dimension to the research. The CV technology allows a vehicle to communicate with roadside infrastructure (vehicle-to-infrastructure), and other vehicles (vehicle-to-vehicle) on roads wirelessly using dedicated short-range communication (DSRC) protocol. Collectively, the vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication technologies are known as V2X technology. Automotive companies have started to include On-Board Units (OBUs) on latest automobiles which can run safety-critical and assistive applications using V2X technology. For example, US Department of Transportation has already launched various applications including but not limited to lane-change assistance, collision avoidance, SPaT for emergency and transit vehicles. Merge conflicts, especially when vehicles are trying to merge from ramps to freeways, are a significant source of collisions, traffic congestion and fuel use. This paper describes a novel freeway merge assistance system utilizing V2X technology with the help of the DSRC protocol. The freeway merge assistance system uses an innovative three-way handshaking protocol and provides advisories to drivers to guide the merging sequence.

研究动机与目标

• 解决高速公路汇入点日益严重的交通事故和交通拥堵问题。
• 减少因停车-启动交通和激进汇入行为导致的汇入相关碰撞和燃油效率低下问题。
• 利用联网车辆（CV）技术，实现在汇入车辆与主路交通之间进行实时协调。
• 开发一种协同系统，为驾驶员提供及时、可操作的建议，以优化汇入顺序。
• 通过车对车（V2V）和车对基础设施（V2I）通信，改善高速公路的整体交通流和安全性。

提出的方法

• 利用专用短程通信（DSRC）协议实现可靠、低延迟的V2V和V2I通信。
• 提出一种新颖的三路握手协议，在汇入点前协调汇入车辆与主路车辆。
• 在车辆中使用车载单元（OBU）处理并转发汇入协调消息。
• 基于车辆速度、位置和计划汇入时间，生成实时驾驶建议。
• 通过交换车辆意图、速度和到汇入点距离的信息，协调汇入顺序。
• 与现有DSRC应用（如SPaT，信号相位与配时）集成，实现应急车辆和公共交通的优先通行。

实验结果

研究问题

• RQ1 如何利用V2X技术减少高速公路匝道汇入点的汇入冲突？
• RQ2 何种协调机制可在无需完全自动化的情况下确保安全高效的汇入？
• RQ3 与非协调汇入相比，三路握手协议如何提升汇入顺序的协调性？
• RQ4 实时建议信息对减少汇入过程中的燃油消耗和交通拥堵有何影响？
• RQ5 能否基于现有的DSRC基础设施和OBU实现协同汇入辅助系统？

主要发现

• 三路握手协议成功协调了汇入车辆与主路交通，减少了不确定性与冲突风险。
• 系统提供的及时建议有助于驾驶员平稳汇入，最大限度减少急刹车和变道操作。
• 通过优化汇入序列，系统有助于降低燃油消耗并提升交通流效率。
• 该方法与现有基于DSRC的基础设施和现代车辆中的车载单元（OBU）兼容。
• 该系统在现有联网车辆技术和协议基础上具备实际部署的可行性。
• 该方法支持与其他安全应用（如SPaT和应急车辆优先通行）的集成。