HIGH-MOUNT INTERCHANGE LIGHTS

UTIL RECENTLY, INTERCHANGES HAD LIGHTS ONLY ON PARTICULAR AREAS SUCH AS SIGN LOCATIONS, APPROACHES, AND EXIT RAMPS. THIS HAS BEEN LESS THAN IDEAL BECAUSE DRIVERS COULD NOT GRASP THE ENTIRE INTERCHANGE LAYOUT AT ONCE. NOW, THE DEVELOPMENT OF HIGH-MOUNT LIGHTING SYSTEMS IS AMELIORATING THIS CONDITION BY PROJECTING LIGHT ONTO LARGER AREAS. LUMINAIRES ARE MOUNTED ON POLES 60 TO 150 FT HIGH, RATHER THAN THE USUAL HEIGHT OF 30 TO 50 FT, AND ARE ARRANGED TO PROVIDE MULTIPLE OVERLAPPING PATTERNS OF LIGHT. THUS, IF A LIGHT BURNS OUT, THE WHOLE AREA REMAINS LIGHTED, BUT AT SLIGHTLY LOWER FOOT-CANDLE LEVELS. IN ADDITION TO THE SAFETY FACTOR, THESE SYSTEMS ARE ALSO MORE ECONOMICAL THAN CONVENTIONAL ONES. ESTIMATES INDICATE THAT IT WOULD TAKE CONVENTIONAL SYSTEMS MORE THAN 60 YEARS TO OVERCOME THE LOWER FIRST COST ADVANTAGES OF THE HIGH-MOUNT SYSTEM. THE PROCEDURE FOR LAYING OUT A TYPICAL HIGH-MOUNT SYSTEM IS DESCRIBED. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/10480594
• Supplemental Notes:
  • Vol 41, No 5, PP 44-47
• Authors:
  • LeVere, R C
• Publication Date: 1971-5

Media Info

• Serial:
  • Civil Engineering
  • Publisher: American Society of Civil Engineers
  • ISSN: 0885-7024
  • Serial URL: http://www.pubs.asce.org/ceonline/newce/html

Subject/Index Terms

• TRT Terms: Economics; Interchanges; Light; Luminaires
• Old TRIS Terms: High mounting
• Subject Areas: Economics; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00221373
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 15 1971 12:00AM