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Development of Guidelines for Permitted Left-Turn Phasing Using Flashing Yellow Arrows.
| 题名： | Development of Guidelines for Permitted Left-Turn Phasing Using Flashing Yellow Arrows. |
| 作者： | Davis, G. A.; Hourdos, J.; Moshtagh, V. |
| 关键词： | Traffic signals, Transportation safety, Transportation planning, Flashing traffic signals, Accident prevention, Traffic flow, Risk assessment, Arrows (Signals), Traffic models, Flashing yellow arrows (FYAs), Left-turn phasing |
| 摘要： | The objective of this project was to develop guidelines for time-of-day use of permitted left-turn phasing, which can then be implemented using flashing yellow arrows (FYA). This required determining how the risk for left-turn crashes varied as traffic-flow conditions varied during the course of a representative day. This was accomplished by developing statistical models, which expressed the risk of occurrence of a left-turn crash during a given hour as a function of the left-turn demand, the opposing traffic volume, and a classification of the approach with respect to the opposing traffic speed limit, the type of left-turn protection, and whether or not opposing left-turn traffic could obstruct sight distance. The models were embedded in a spreadsheet tool which will allow operations personnel to enter, for a candidate intersection approach, existing turning movement counts, and a classification of the approach with respect to speed limit, turn protection, and sight distance issues and receive a prediction of how the risk of left-turn crash occurrence varies throughout the day, relative to a user-specified reference condition. |
| 总页数： | Davis, G. A.; Hourdos, J.; Moshtagh, V. |
| 报告类型： | 科技报告 |
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