RETROREFLECTIVE RAISED PAVEMENT MARKERS: A TWO-YEAR FIELD EVALUATION IN TEXAS. FINAL REPORT

This report documents the results of field testing seventeen types of retroreflective raised pavement markers (RRPMs) installed in August 1992 at four interstate locations around San Antonio, Texas. Reflectivity measurements were taken periodically at each site using a portable retroreflectometer. These data were supplemented with laboratory reflectivity measurements from RRPMs taken from each site and sent to the Texas Department of Transportation (TxDOT) Materials and Testing Laboratory in Austin, Texas. Study results indicate that most of the RRPMs experienced significant losses in reflectivity over short periods of time. Under the range of traffic conditions examined, many RRPMs dropped below approximate minimum reflectivity thresholds after less than six months in the field. Certain RRPM designs did perform considerably better than others. In general, RRPM reflectivity was related to the cumulative vehicular exposure since installation. Using approximate RRPM purchase and installation cost data from TxDOT, it appears that the more durable (and expensive) RRPMs can be justified from a cost-effectiveness perspective once AADT levels on the roadway reach 10,000 vehicles per lane per day.

  • Supplemental Notes:
    • Research study title: Raised Pavement Marker Field Testing.
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011

    Texas Department of Transportation

    Research and Technology Transfer Office, P.O. Box 5051
    Austin, TX  United States  78763-5051
  • Authors:
    • Ullman, G L
  • Publication Date: 1994-10

Language

  • English

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 80 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00675190
  • Record Type: Publication
  • Report/Paper Numbers: TX-94/1946-3F, Res Rept 1946-3F, TTI: 7-1946
  • Contract Numbers: Study 7-1946
  • Files: TRIS, STATEDOT
  • Created Date: Mar 3 1995 12:00AM