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Dynamic Flashing Yellow Arrow (FYA) A Study on Variable Left-Turn Mode Operational and Safety Impacts Phase II – Model Expansion and Testing.
| 题名： | Dynamic Flashing Yellow Arrow (FYA) A Study on Variable Left-Turn Mode Operational and Safety Impacts Phase II – Model Expansion and Testing. |
| 作者： | Abou-Senna, H.; Radwan, E.; Eldeeb, H.; Navarro, A. |
| 关键词： | Flashing Yellow Arrow (FYA)##Decision Support System (DSS)##Transportation safety##Left-Turn Mode##Time of day##Traffic information devices## |
| 摘要： | The flashing yellow arrow (FYA) signal display creates an opportunity to enhance the left-turn phase with a variable mode that can be changed on demand. The previously developed decision support system (DSS) in phase I facilitated the selection of the FYA left-turn mode, changing by time of day at intersections. There was a need to continue to refine the interactive framework to improve its service. However, the ultimate objective of the continued research of phase II was to demonstrate the ability to execute the automation of the process. Phase II of the FYA project provided additional intersection data that refined the work that was previously completed. Virtual testing of the DSS was first conducted using VISSIM application programming interface (API) to confirm the validity of the procedure and logic. The DSS was then tested in a field testing environment. A custom communications software was developed to retrieve instantaneous channel input data, synchronize opposing thru green phase, analyze traffic information, provide the algorithm decision, and generate a real-time log recording the events. The proposed algorithm is implemented with the goal of safely optimizing traffic operations with constant analysis in real-time to determine whether it would be optimal to switch the red arrow to a flashing yellow arrow. The algorithm determines the time interval between the successive arrivals of vehicles and computes the corresponding headway for each lane by cycle on a second-by-second basis. The DSS was ultimately tested at two different intersections in Seminole County. The DSS testing confirmed the applicability and validity of the developed DSS as well as the aforementioned procedure, criteria, and logic. |
| 总页数： | 98 |
| 报告类型： | 科技报告 |
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