RAISED REFLECTIVE LANE MARKERS FOR URBAN ROADWAYS

FOUR REPRESENTATIVE BRANDS OF RAISED REFLECTIVE ROADWAY MARKERS WERE EVALUATED FOR ONE YEAR. REFLECTIVITY OF THE MARKERS FROM ILLUMINATION OF AUTOMOBILE HEADLAMPS WAS MEASURED PERIODICALLY USING A LUCKIESH TAYLOR BRIGHTNESS METER. THE REFLECTIVITY OF ALL BRANDS DROPPED IMMEDIATELY TO A MEAN OF ABOUT 50% OF THE NEW REFLECTIVITY, THEN VARIED ABOVE AND BELOW THIS VALUE DEPENDING ON WEATHER AND FOULING. THE LOSS OF MARKERS FROM THE ROADWAY WAS EVALUATED. THE EPOXY ADHESIVES WERE SATISFACTORY FOR PLASTIC MARKERS, ALL LOSSES WERE DUE TO FAILURE OF THE ASPHALT ROADBED UNDER THE MARKERS. THE CERAMIC MARKERS WERE LOST DUE TO FAILURE OF THE EPOXY TO MARKER SURFACE. THE USE OF RUBBER PAD ADHESIVE WAS A FAILURE UNDER THE CONDITIONS OF THIS TEST. FAILURE OF THE PLASTIC MARKERS WAS NEGLIGABLE. THE CERAMIC MARKERS SUFFERED DRASTIC LOSS OF THE REFLECTIVE ELEMENTS. /AUTHOR/

• Corporate Authors:

  Louisiana Tech University, Ruston

  Ruston, LA  United States  71272

  Louisiana Department of Highways

  P.O. Box 44245, Capitol Station
  Baton Rouge, LA  United States  70804

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Calhoun, J D
• Publication Date: 0

Subject/Index Terms

• TRT Terms: Adhesives; Ceramic materials; Epoxides; Marine fouling; Plastics; Raised separators; Reflective signs; Reflectivity; Weather
• Old TRIS Terms: Epoxy; Reflector markers
• Subject Areas: Geotechnology; Highways; Materials; Operations and Traffic Management;

Filing Info

• Accession Number: 00215935
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Report/Paper Numbers: 66-2t
• Files: TRIS, STATEDOT
• Created Date: Sep 28 1970 12:00AM