RAISED PAVEMENT MARKERS AT HIGH-HAZARD LOCATIONS

Even though a large number of potentially hazardous locations exist on rural, two-lane roads, guidelines have not been developed for use of raised pavement markers under night and during adverse weather conditions. The purpose of this study was to evaluate the use of raised markers at a sharp curve and narrow bridge in Kentucky. Visual observations, speed data, encroachment data, and accident data were used to evaluate the effectiveness of the markers. Extensive viisual observations of the sharp curve and narrow bridge in this study have provided data to support recommendations for improved delineation at similar sites on rural, two-lane and fooor-lane roads. The best delineation found for sharp curves is to place raised markers on the centerline at 40-foot (12.2-m) spacings. At narrow bridge sites (bridge width less than approach width), raised markers should be placed att a decreasing spacing when approaching the bridge. The number of markers required and the location at which they should begin were also determined. A delineation improvement program for narrow bridges and sharp curves involving raised markers would mainly apply to rural areas. Snowplow damage could make use of conventional markers impractical. (A)

• Record URL:
  https://doi.org/10.13023/KTC.RR.1979.522
• Corporate Authors:

  Kentucky Department of Transportation

  Bureau of Highways
  Frankfort, KY  United States  40601
• Authors:
  • Pigman, J G
  • Agent, K R
• Publication Date: 1979-6

Media Info

• Features: Figures; References; Tables;
• Pagination: 40 p.

Subject/Index Terms

• TRT Terms: Guidelines; High risk locations; Highway safety; Measures of effectiveness; Narrow bridges; Raised road markings; Rural highways; Traffic crashes; Two lane highways; Weather
• Uncontrolled Terms: Effectiveness
• Old TRIS Terms: Raised traffic markings
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control; I82: Accidents and Transport Infrastructure;

Filing Info

• Accession Number: 00319867
• Record Type: Publication
• Report/Paper Numbers: Rept RR 522
• Files: TRIS, STATEDOT
• Created Date: Feb 6 1981 12:00AM