GROOVED STRIPES FOR PLOW-RESISTANT WET-NIGHT LANE DELINEATION. PHASE II--RECESSED REFLECTOR DELINEATION

In this study's first stage, 44 combinations of groove geometry and paint treatments were installed on an abandoned roadway to evaluate their wet-night visibility. The most promising patterns were then installed on an operational highway for further evaluation in the study's second stage. The results indicated that only a recessed reflector system was more visible than conventional beaded paint stripes from a moving vehicle. This report details a third stage, which consisted of placing 105 recessed reflectors on an operational highway to identify installation problems, the amount of delination provided, and possible maintenance problems. Variables included in the installation were pavement type, roadway geometry, and reflector and recess depth and configuration. Evaluations consisted of wet-night visibility surveys, system condition surveys, telephotometer measurements, and subjective evaluations. After 1 year of exposure to traffic and snow-and-ice control operations, all reflectors are functioning. Sight distances under wet-night conditions range from 480 ft to less than 40 ft (146.3 to 12.2 m), and are influenced by roadway geometry, reflector and recess depths, dirt accumulation, and drainage. Delineation, which depends on the reflector's sight distance and target value, varies from excellent to poor. Glare on the pavement reduced the target value of reflectors along one section of roadway and contributed to poor delineation. /FHWA/

  • Supplemental Notes:
    • Sponsored by DOT, Federal Highway Administration.
  • Corporate Authors:

    New York State Department of Transportation

    Engineering Research and Development Bureau, 1220 Washington Avenue
    Albany, NY  United States  12232
  • Authors:
    • Bryden, J E
    • Allison, James R
    • Gurney, G F
  • Publication Date: 1976-8

Media Info

  • Pagination: 29 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00165755
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-76-131 Final Rpt., FCP 31I1-083
  • Contract Numbers: DOT-FH-11-9-8074
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Mar 29 1978 12:00AM