HIGH-LEVEL LIGHTING

THE HIGH-LEVEL LIGHTING SYSTEM DEVELOPED BY THE STATE HIGHWAY DEPARTMENT OF TEXAS IS BEING INSTALLED TO PROVIDE A PANORAMIC VIEW OF AN ENTIRE INTERCHANGE. PLANS FOR THE PROJECT CALL FOR TWO TYPES OF ILLUMINATION: SOME NINETEEN 100-FOOT TOWERS ARE TO BE PROVIDED IN THE INTERCHANGE AREAS OF THE LOOP SECTION AND THE INTERVENING NORMAL ROADWAY SECTIONS WILL HAVE 50-FOOT DUAL-MOUNTED 1,000-WATT LUMINAIRES MOUNTED IN THE MEDIAN AT A SPACING OF ABOUT 300 FEET BETWEEN UNITS. THE 100-FOOT TOWERS ARE TO BE LOCATED SO EACH CAN ADEQUATELY LIGHT A CIRCULAR AREA WITH A DIAMETER OF 1,000 FEET. A 150-FOOT TOWER WILL BE CONSTRUCTED IN THE CENTER OF THE INTERCHANGE. PREVIOUS EVALUATION STUDIES OF INTERCHANGE LIGHTING USED TEN PROFESSIONAL ENGINEERS WHO EACH DROVE THROUGH THE VARIOUS INTERCHANGING MANEUVERS UNDER THREE CONDITIONS: NO LIGHTING, EXISTING SAFETY LIGHTING, AND HIGH-LEVEL LIGHTING. EACH ONE ANSWERED A QUESTIONAIRE ON THE THREE CONDITIONS AND A SUMMARY SHOWED THE ADVANTAGE OF BEING ABLE TO SEE GEOMETRIC DESIGN FEATURES OF THE ENTRANCE RAMP FOR SAFETY MANEUVERS.

  • Supplemental Notes:
    • Vol 14, No 10, PP 17-19, 5 PHOT
  • Publication Date: 1967-10

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00203270
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 3 1994 12:00AM