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首页> 外文期刊>Journal of Transportation Engineering >Using Crash Modification Factors to Appraise the Safety Effects of Pedestrian Countdown Signals for Drivers
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Using Crash Modification Factors to Appraise the Safety Effects of Pedestrian Countdown Signals for Drivers

机译：使用碰撞修正因子评估行人倒计时信号对驾驶员的安全影响

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摘要

Although pedestrian countdown signals (PCSs) are meant for pedestrians, they give cues to drivers on the remaining amount of green as the timer counts down. This study focuses on the evaluation of safety effectiveness of PCSs to drivers in the cities of Jacksonville and Gainesville, Florida, using the before-after study with the empirical Bayes method. This analysis explored 110 intersections with PCSs and their respective 93 comparison sites. The findings indicate that PCSs significantly improve driver safety by 8.8% reduction in total crashes, 8.0% in rear-end and 7.1 % in property-damage-only crashes, where both of these results were significant at the 95% confidence level. Results for angle crashes as well as fatal and injury crashes were not significant at the 95% confidence level. Also discussed in this study are the crash modification functions developed to show the relationship between the estimated crash modification factors and total entering traffic volume at the intersection. In summary, the results suggest the usefulness of PCSs for drivers.
机译：尽管行人倒计时信号（PCS）用于行人，但当计时器倒计时时，它们会向驾驶员提示剩余的绿色。这项研究的重点是使用经验贝叶斯方法进行前后研究，以评估PCS对佛罗里达州杰克逊维尔和盖恩斯维尔城市驾驶员的安全有效性。该分析探索了与PCS的110个交叉路口以及它们各自的93个比较点。研究结果表明，PCS显着提高了驾驶员的安全性，使总事故率降低了8.8％，后端事故率降低了8.0％，纯财产事故率降低了7.1％，而这两个结果在95％的置信度下都是显着的。在95％的置信度下，角度碰撞以及致命和伤害碰撞的结果均不显着。在这项研究中还讨论了碰撞修正功能，以显示估计的碰撞修正因子与交叉口处的总进入交通量之间的关系。总而言之，结果表明PCS对于驱动程序很有用。

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