This paper reports on the results of an evaluation of a rear-end and pedestrian crash warning system installed on transit agency buses with the goal of collecting and providing information to help agencies make decisions about investing in such systems. The results from this evaluation indicate that the tested crash warning system had a positive effect on improving the reaction times to rear-end and pedestrian conflicts and on increasing the yield of drivers to pedestrians. The results from the evaluation also indicate improvement in driver behavior as reflected by the increase in the time headway between vehicles, reduction in the number of alerts for both rear-end and pedestrian crashes, and the reduction in the number of hard brake events. However, bus operators’ acceptance of the system seems to be low, pointing to the need for additional outreach and education of the drivers on the system and its effectiveness. The results from the return-on-investment analysis show that although installing the system on every bus of the transit agency may not be cost-effective, installing the devices on only the buses that operate on the high-crash bus routes is cost-effective.

本文报告了对安装在公交机构巴士上的追尾和行人碰撞警告系统的评估结果，目的是收集和提供信息以帮助机构做出投资此类系统的决策。该评估的结果表明，经过测试的碰撞警告系统对改善追尾和行人冲突的反应时间以及提高驾驶员对行人的让步率具有积极影响。评估结果还表明驾驶员行为有所改善，表现为车辆之间的时距增加、追尾和行人碰撞警报数量减少以及硬制动事件数量减少。然而，公交运营商对该系统的接受程度似乎很低，指出需要对系统及其有效性的驱动程序进行额外的宣传和教育。投资回报分析结果表明，虽然在公交机构的每辆公交车上安装该系统可能并不划算，但仅在运行在高事故公交路线上的公交车上安装该设备是划算的.