Operational evaluation of right turns followed by U-turns as an alternative to direct left turns, Vol. 3
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2001-09-01
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Alternative Title:Safety evaluation of right turns followed by U-turns as an alternative to direct left turns
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Abstract:This project evaluated the safety and operational impacts of two alternative left-turn treatments from driveways/side streets. The two treatments were: (1) Direct left turns (DLT) and, (2) Right turns followed by U-turns (RTUT). Ten sites were selected for field data collection where each site experienced one or both of the left turn alternatives from the driveway or side street. Video cameras were set up on scaffolding to achieve enough viewing height and all the traffic movements at the selected sites were recorded. These videotapes were later reviewed and data related to direct left turns or right turns followed by U-turn movements were gathered. using the collected data, operational analysis was conducted using two methods, empirical model development and simulation.
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