A REFLECTANCE MEASURING SYSTEM FOR FIELD USE

A portable reflectance measuring system suitable for in situ measurement of road signs, pavement markers and road stripes has been constructed. The reflectometer has adequate sensitivity to allow measurements of road stripes at grazing incidence and to permit measurements to be made from off-the-road locations, thus avoiding obstructing traffic or exposing the operating personnel to unnecessary hazards. The use of phase-lock detection techniques to eliminate background radiation allows measurements to be made on a sun-lit target. The instrument's spectral response simulates the human photopic response when viewing under a 2856K (CIE standard source A) lamp as required by federal specification LS-300A.

  • Supplemental Notes:
    • Sponsored in part by Alabama State Highway Dept., Montgomery.
  • Corporate Authors:

    University of Alabama, University

    Bureau of Engineering Research
    University, AL  United States  35486

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    Alabama State Highway Department

    11 South Union Street
    Montgomery, AL  United States  36130
  • Authors:
    • WEBB, W E
    • Dudgeon, J E
  • Publication Date: 1977-4

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 63 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00181385
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: HPR-82 Final Rpt.
  • Contract Numbers: 930-76
  • Files: NTIS, TRIS, USDOT, STATEDOT
  • Created Date: Oct 12 1979 12:00AM