Operational and Crash Evaluation of Lighted Pavement Marker Stop Bars and Led Outlined Traffic Signal Backplates

This paper presents an evaluation of two supplemental traffic control devices, a Lighted Stop Bar System (LSBS) and light emitting diode (LED) outlined traffic signal backplates. The LSBS consists of lighted pavement markers placed in the pavement parallel to the painted intersection stop bar. The pavement markers of the LSBS emit a red light during the red indication of the traffic signal. The LED backplates emit a red light around the perimeter of the traffic signal backplate when the traffic signal indication is red. These two types of devices were installed separately at separate intersections, and a before and after study was conducted to determine changes in crashes, red light running violations, and right turn on red violations. It was determined that right turn on red violations were significantly reduced at the LSBS intersection, while the intersection with the LED backplates exhibited significant reductions in red light running violations. Additional intersections were later outfitted with LSBSs and/or LED backplates, and an aggregate crash analysis for all treatment intersections shows a reduction in red light running crashes over time since the devices were activated.

• Corporate Authors:

  ITS America

  1100 17th Street, NW, 12th Floor
  Washington, DC  United States  20036
• Authors:
  • Tydlacka, Jonathan
  • Voigt, Anthony P
  • Langford III, Walter C
• Conference:
  • ITS America 20th Annual Meeting & Exposition
  • Location: Houston TX, United States
  • Date: 2010-5-3 to 2010-5-5
• Publication Date: 2010

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; Photos; References; Tables;
• Pagination: 15p
• Monograph Title: ITS America 20th Annual Meeting & Exposition

Subject/Index Terms

• TRT Terms: Before and after studies; Intersections; Light emitting diodes; Red light running; Right turn on red; Road markings; Traffic control devices; Traffic crashes; Traffic safety; Traffic signals; Traffic violations
• Uncontrolled Terms: Traffic signal backplates
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control;

Filing Info

• Accession Number: 01342854
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 23 2011 9:07AM