SEMI-DIRECTIONAL FIXED LIGHTING FOR ONE-WAY HIGHWAYS

THIS PAPER IS A PROGRESS REPORT COVERING SEVERAL STAGES IN THE DEVELOPMENT OF SEMI-DIRECTIONAL FIXED LIGHTING AIMED TOWARD PROVIDING DRIVER VISIBILITY, COMFORT, AND SAFETY. THE SEMI-DIRECTIONAL SYSTEM PROVIDES MORE UNIFORM OBSTACLE LUMINANCE; BETTER CONTRAST BETWEEN THE OBJECT AND BACKGROUND; GOOD SUBJECTIVE PAVEMENT LUMINANCE AND UNIFORMITY; NEGLIGIBLE DISABILITY VEILING BRIGHTNESS ON BOTH THE MAIN HIGHWAY AND ADJACENT AREAS AND SERVICE ROADS; A SAFE, 30-DEGREE WIDE LATERAL FIELD OF VIEW (200 FEET AHEAD) FROM ANYWHERE ON THE DRIVING LANES; AND A MINIMUM OF DISCOMFORT GLARE WHILE OPTICAL GUIDANCE HAS BEEN MAINTAINED FOR THE DRIVER'S USE. THESE BENEFITS ARE AVAILABLE AT A LONGITUDINAL SPACING TO MOUNTING HEIGHT RATIO OF UP TO 5 TO 1 FROM AN ESTHETICALLY PLEASING LUMINAIRE. /AUTHOR/

  • Availability:
  • Supplemental Notes:
    • Vol 1, No 1, PP 14-20
  • Corporate Authors:

    Illuminating Engineering Society

    120 Wall Street, 17th Floor
    New York, NY  USA  10005-4001
  • Authors:
    • Franklin, J S
  • Publication Date: 1971-10

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00221569
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 10 1972 12:00AM