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Safety of the Las Vegas left-turn display |
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| Authors: | Ozlem Ozmen Zong Z Tian A Reed Gibby |
| Affiliation: | 1. AMEC Environment & Infrastructure, 140 Quarry Park Blvd SE, T2C 3G3 Calgary, Alberta, Canada;2. Department of Civil & Environmental Engineering, University of Nevada, Reno, Reno, NV 89557, United States;3. Transportation Engineer, Department of Civil & Environmental Engineering, University of Nevada, Reno, Reno, NV 89557, United States |
| Abstract: | This paper provides a safety evaluation of a special protected/permitted left turn signal control (Las Vegas LT Display) that has been implemented in the urbanized area of Las Vegas, Nevada. The Las Vegas LT Display eliminates the yellow trap condition for leading approach in lead/lag operation. It provides protected only left turns during certain times of day by suppressing the permitted green ball and yellow ball displays. Before and after studies were conducted using the crash data from 10 intersections. Results from the analyses indicated that no obvious safety concerns due to use of the special display. |
| Keywords: | Protected/permitted left-turn control Crash rates Traffic signals Safety Before and after study |
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