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Evaluating the Impacts of Different Exit Strategies of Emergency Vehicle Preemption on Arterial Signal Coordination: A Case Study in Reno, Nevada
| 题名： | Evaluating the Impacts of Different Exit Strategies of Emergency Vehicle Preemption on Arterial Signal Coordination: A Case Study in Reno, Nevada |
| 正文语种： | eng |
| 作者： | Jianyuan Xu;Zong Tian;Aobo Wang |
| 作者单位： | Dept. of Civil and Environmental Engineering Univ. of Nevada Reno 1664 N. Virginia St. MS258 Reno NV 89557;Dept. of Civil and Environmental Engineering Univ. of Nevada Reno 1664 N. Virginia St. MS258 Reno NV 89557;Dept. of Civil and Environmental Engineering Univ. of Nevada Reno 1664 N. Virginia St. MS258 Reno NV 89557 |
| 摘要： | Emergency vehicle preemption (EVP), a common traffic signal preemption in urban areas, is used to prioritize the right-of-way to emergency vehicles at signalized intersections by terminating active signal timing plans and running preemption plans. However, such mandatory signal changes can disrupt arterial signal coordination when an emergency vehicle travels through a well-coordinated signalized arterial. The research need has emerged to evaluate and minimize such disruptions to arterial signal coordination. Therefore, this research summarizes EVP operations along with preemption modules in North America Econolite Cobalt signal controllers (EOS software version) and investigates five available EVP exit strategies to minimize disruptions: return to defined phases, return to coordinated operations, return to free operations, return to first skipped phase, and return to the most delayed phase. The impacts of five exit strategies on arterial signal coordination are evaluated and compared on a signalized arterial through hardware-in-the-loop simulation (HILS) in four different simulation scenarios. From simulation results, it is found that EVP tends to worsen arterial and intersection operations for all five EVP exit strategies by increasing the arterial travel times and the total vehicle movement delay at preempted coordinated intersections. The performance of different EVP exit strategies is influenced by the route of the emergency vehicle and the EVP activation point. Furthermore, the selection of an EVP exit strategy depends on different operational objectives after EVP. When recovering arterial signal progression becomes the primary objective, the return to coordinated operations exit strategy is recommended to be selected at intersections to minimize disruptions. The return to the free operations exit strategy is recommended to avoid queue spillover and phase split failure issues at intersections when improving the intersection-level performance turns out to be the overarching goal. |
| 出版年： | 2023 |
| 期刊名称： | Journal of Transportation Engineering |
| 卷： | 149 |
| 期： | 11 |
| 页码： | 05023007.1-05023007.17 |
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