EVALUATION OF DETECTION AND SIGNING SYSTEMS FOR HIGH SPEED SIGNALIZED INTERSECTIONS

The effects of two dynamic signs that begin to flash a few seconds before the onset of the yellow interval and a static sign that flashes all the time were examined at tangent and curved approaches to rural, high speed signalized intersections. The dynamic signs included (a) a PTSWF (prepare to stop when flashing) sign, and (b) a FSSA (flashing symbolic signal ahead) sign with green, yellow, and red circles. The static sign was a CFSSA (continuously flashing symbolic signal ahead) sign with the three circles. The effects of these signs on vehicular speeds at different segments of the intersection approach including the dilemma zone were analyzed as were the vehicle conflict rates and the responses from the drivers' surveys. The study revealed that the PTSWF and FSSA signs generally have similar effects on driver behavior. The use of a PTSWF sign at a tangent approach to a high speed signalized intersection is discouraged. It is advantageous to consider the CFSSA sign before using the PTSWF sign because the PTSWF and FSSA signs have a few undesirable effects on vehicular speeds, unlike the CFSSA sign. The FSSA sign should not be used as a replacement for the PTSWF sign in Ohio.

  • Corporate Authors:

    University of Cincinnati

    Department of Civil and Environmental Engineering, P.O. Box 210071
    Cincinnati, OH  United States  45221-0071

    Ohio Department of Transportation

    25 South Front Street
    Columbus, OH  United States  43215

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Pant, P D
    • Xie, Y
    • Huang, X H
  • Publication Date: 1996-3

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 236 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00725545
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/OH-95/016, Final Report
  • Contract Numbers: State Job 14436(0)
  • Files: TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Sep 10 1996 12:00AM