title: Safety of the Las Vegas left-turn display.
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.
authors.affiliation: AMEC Environment & Infrastructure, 140 Quarry Park Blvd SE, T2C 3G3 Calgary, Alberta, Canada. Electronic address: ozlem.ozmen@amec.com.
authors.forename: Ozlem
authors.initials: O
authors.lastname: Ozmen
authors.forename: Zong Z
authors.initials: ZZ
authors.lastname: Tian
authors.forename: A Reed
authors.initials: AR
authors.lastname: Gibby
mesh_terms: D000063:Accidents, Traffic / Q000517:prevention & control* / Q000706:statistics & numerical data; D001334:Automobile Driving / Q000706:statistics & numerical data*; D002958:City Planning; D004779:Environment Design / Q000706:statistics & numerical data*; D006801:Humans; D009505:Nevada; D016017:Odds Ratio; D012449:Safety
keywords: Before and after study; Crash rates; Protected/permitted left-turn control; Safety; Traffic signals