DEVELOPMENT AND EVALUATION OF RAISED TRAFFIC LANE MARKERS - 1953 TO 1968

A SYSTEM FOR DELINEATING TRAFFIC LANES IN SNOW-FREE AREAS USING RAISED PAVEMENT MARKERS WAS EVALUATED AND ADOPTED. FOUR WHITE NON-REFLECTIVE MARKERS ARE PLACED ON THREE FOOT CENTERS FOLLOWED BY A FIFTEEN FOOT GAP. A REFLECTIVE MARKER IS PLACED IN THE CENTER OF EACH GAP ON CURVES AND IN THE CENTER OF EVERY OTHER GAP ON TANGENTS. THIS SYSTEM IS MUCH MORE DURABLE THAN TRAFFIC PAINT AND GIVES GOOD DAYTIME AND NIGHTTIME DELINEATION UNDER MOST WEATHER CONDITIONS. NON- REFLECTIVE CERAMIC MARKERS WERE FOUND TO PERFORM BETTER THAN OTHER TYPES IN AREAS OF HOT DRY CLIMATE IN TERMS OF MINIMIZING TIRE STAINING EFFECTS AND MAINTAIN GOOD DAYTIME VISIBILITY. NON-REFLECTIVE POLYESTER MARKERS MAY BE USED IN COOLER AREAS WHERE TEMPERATURES SELDOM RISE ABOVE 80F AND TIRE-STAINING EFFECTS ARE NOT SERIOUS. WEAR OF THE CERAMIC MARKERS IS BY PITTING AND DULLING BUT THIS EFFECT IS NOT SERIOUS FOR A PERIOD OF 10 YEARS. THE ACRYLIC CUBE CORNER MARKER WAS FOUND TO BE THE MOST EFFECTIVE REFLECTORIZED MARKER FOR NIGHTTIME VISIBILITY AND IS EXPECTED TO LAST FROM 3 TO 5 YEARS. SATISFACTORY MEDIAN DELINEATION WAS OBTAINED WITH A PATTERN OF RAISED YELLOW MARKERS, BOTH REFLECTIVE AND NON-REFLECTIVE TYPES. APPROPRIATE TEST METHODS AS WELL AS SPECIFICATIONS FOR RAISED MARKERS AND EPOXY ADHESIVES ARE PROVIDED. /AUTHOR/

• Supplemental Notes:
  • Hpr, D-5-14
• Corporate Authors:

  California Division of Highways

  Bridge Department
  Sacramento, CA  United States  05914

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Rooney, H A
  • Shelly, T L
• Publication Date: 1968-6

Media Info

• Pagination: 49 p.

Subject/Index Terms

• TRT Terms: Acrylic resins; Ceramic materials; Highway delineators; Highway design; Medians; Night visibility; Polyester resins; Raised separators; Reflective signs; Reflectorized materials; Road markings; Temperature; Test procedures; Traffic lanes
• Old TRIS Terms: Corner marker; Highway delineation; Reflector markers; Reflectorization; Traffic marking
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00224887
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Jan 8 1994 12:00AM