ECONOMIC STUDY OF VARIOUS MOUNTING HEIGHTS FOR HIGHWAY LIGHTING

COST-EFFECTIVENESS OF VARIOUS LUMINAIRE MOUNTING HEIGHTS AND A METHOD OF EVALUATING ALTERNATE LIGHTING DESIGNS THAT WILL LEAD TO MORE ECONOMICAL HIGHWAY LIGHTING ARE EXAMINED. INITIAL AVERAGE HORIZONTAL FOOTCANDLES AND UNIFORMITY OF ILLUMINATION HAVE BEEN COMPUTED FOR ONE DIRECTION OF 2, 3 AND 4-LANE DIVIDED HIGHWAYS USING OVERHEAD MERCURY LUMINAIRES MOUNTED AT 30, 40, 45 AND 50-FT HEIGHTS. THE VARIATION OF FOOTCANDLES AND UNIFORMITY WITH DIFFERENT MOUNTING HEIGHTS AND LUMINAIRE SPACINGS ARE ILLUSTRATED. ESTIMATED INITIAL, EQUIVALENT ANNUAL CAPITAL, MAINTENANCE AND POWER COSTS PER MILE ARE PRESENTED FOR OVERHEAD AND BRIDGE RAIL LIGHTING. FLOODLIGHTING OF AN INTERCHANGE AREA WITH LUMINAIRES MOUNTED AT 100 FT HAS BEEN EVALUATED AND COSTS COMPARED TO A CONVENTIONAL SYSTEM OF HEAD LUMINAIRES MOUNTED AT 30 FT. LIGHTING DESIGNS WITH MOUNTING HEIGHTS OF 40 TO 50 FT WILL PROVIDE MORE ECONOMICAL AND EFFECTIVE LIGHTING THAN THE USUAL 30-FT HEIGHT. HIGHER MOUNTING HEIGHTS WILL NORMALLY PROVIDE FOR SAFER AND MORE AESTHETIC LIGHTING DESIGNS.

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References; Tables;
  • Pagination: pp 1-15
  • Monograph Title: Night visibility
  • Serial:

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Filing Info

  • Accession Number: 00201326
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 5 1994 12:00AM