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Safety Evaluation of Right Turns Followed by U-Turns (4 Lane Arterials) as an Alternative to Direct Left Turns, Conflict Analysis.
| 题名： | Safety Evaluation of Right Turns Followed by U-Turns (4 Lane Arterials) as an Alternative to Direct Left Turns, Conflict Analysis. |
| 作者： | LU, J.; PERNIA, J. C.; PIRINCCIOGLU, F. |
| 关键词： | CONFLICTS; LEFT-TURNS; SIGNALIZED INTERSECTIONS; U-TURNS |
| 摘要： | This project evaluated a research project that evaluated the safety effects of right turns followed by U-turns (RTUT) at signalized intersections and at median openings as an alternative to direct left turns (DLT) from driveways or side streets on four lane arterials. Safety of both alternatives was evaluated based on traffic conflict analysis. Nine types of conflicts were utilized for this study. Five of the conflict types were related to RTUT movements, while the rest of them were related to DLR movements. Over 500 hours data were collected at sixteen sites with the help of video recording equipment. Data collection sites were divided into two sets by geometric criteria. At the first set of sites, the drivers had to complete U-turn movement of RTUT at a signalized intersection. On the other hand, at the second set of sites the U-turns were at median openings. At traffic signal sites, DLT movements generated two times more conflicts per hour than RTUT movements. |
| 报告类型： | 科技报告 |
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- Operational Evaluation of Right Turns Followed by U-Turns (4-Lane Arterials) as an Alternative to Direct Left Turns.
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