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Quantifying the Safety Benefits of Transit Signal Priority Using Full Bayes Before-After Study
| 题名： | Quantifying the Safety Benefits of Transit Signal Priority Using Full Bayes Before-After Study |
| 正文语种： | eng |
| 作者： | Ali, Md Sultan;Kitali, Angela E.;Kodi, John;Alluri, Priyanka;Sando, Thobias |
| 作者单位： | Florida Int Univ Dept Civil & Environm Engn 10555 West Flagler Si EC 3720 Miami FL 33174 USA;Florida Int Univ Dept Civil & Environm Engn 10555 West Flagler Si EC 3720 Miami FL 33174 USA;Florida Int Univ Dept Civil & Environm Engn 10555 West Flagler Si EC 3720 Miami FL 33174 USA;Florida Int Univ Dept Civil & Environm Engn 10555 West Flagler Si EC 3720 Miami FL 33174 USA;Univ North Florida Sch Engn 1 UNF Dr Jacksonville FL 32224 USA |
| 关键词： | Transit signal priority (TSP);Traffic safety;Full Bayesian approach;Crash modification factors;Before-after study |
| 摘要： | Transit signal priority (TSP) is a strategy that prioritizes the movement of transit vehicles through a signalized intersection to minimize transit delay and improve travel time reliability. Although the operational benefits are usually considered the primary criteria when deploying TSP, little attention is given to the anticipated safety impacts of TSP. Few studies that examined the safety impacts of TSP indicated inconsistent results. The objective of this study was to evaluate the safety performance of TSP. An observational before-after full Bayesian with a comparison-group approach was adopted to develop crash modification factors for total, fatal and injury (FI), and property damage only (PDO) crashes. The analysis was based on 41 transit corridors in Florida. Deployment of TSP resulted in a 12%, 14%, and 18% reduction in total, FI, and PDO crashes, respectively. Overall, the study results indicate that the deployment of TSP improves safety along the corridors. The study findings provide researchers and practitioners with an effective means for quantifying the safety benefits of the TSP and conducting an economic appraisal of TSP. |
| 出版年： | 2022 |
| 期刊名称： | Journal of Transportation Engineering |
| 卷： | 148 |
| 期： | 1 |
| 页码： | 04021102.1-04021102.9 |
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