Safety of the Las Vegas left-turn display

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• 作者：Ozlem Ozmen ; Zong Z. Tian ; A. Reed Gibby
• 关键词：Protected/permitted left-turn control ; Crash rates ; Traffic signals ; Safety ; Before and after study
• 刊名：Accident Analysis and Prevention
• 出版年：January, 2014
• 年：2014
• 卷：62
• 期：Complete
• 页码：95-101
• 全文大小：669 K

文摘

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.