HIGH-MAST LIGHTING IN COUNTY DUBLIN

The choice of lighting for the Lucan by-pass on the Galway road out of Dublin is described. The author first outlines the history of the use of high-mast lighting systems in the Republic of Ireland. The system chosen consists of 11 winch-down-type masts varying in height from 30m near the overpass to 25m along the slip lanes to where they merge with the main dual carriageway. The masts are positioned in a staggered pattern between the main carriageway and the slip roads thus keeping the median free of obstruction. The construction of the masts, drive-train, head frame, lantern carriage and lanterns are described. An illuminance of 20 lux on the main carriageway and 10 lux on the slip roads was chosen in accordance with BS5489 Part 5. Details are given of alternative mast positions considered and the use of computer techniques to evaluate schemes. A formula is developed for calculating the number of lanterns required. The author concludes that the use of high-mast lighting has resulted in an uncluttered scheme with reduced glare. Although installation costs are 70% higher and 100% more energy is used, maintenance costs are 76% less.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09504559
• Corporate Authors:

  INSTITUTION OF LIGHTING ENGINEERS

  LENNOX HOUSE, 9 LAWFORD RD
  Rugby, Warwickshire,   United Kingdom 
• Authors:
  • Cleary, K
• Publication Date: 1989-9

Language

• English

Media Info

• Pagination: p. 145-149
• Serial:
  • THE LIGHTING JOURNAL
  • Volume: 54
  • Issue Number: 3
  • Publisher: INSTITUTION OF LIGHTING ENGINEERS
  • ISSN: 0950-4559

Subject/Index Terms

• TRT Terms: Beltways; Bypasses; Calculation; Construction; Costs; Design; Energy; Installation; Interchanges; Lanterns; Lighting columns; Luminance; Maintenance; Numbers; Operating costs; Street lighting
• ITRD Terms: 2709: Bypass (loop road); 6464: Calculation; 3655: Construction; 224: Cost; 9011: Design (overall design); 213: Energy; 3840: Installation; 433: Interchange; 516: Lantern; 545: Lighting (street); 527: Lighting column; 525: Luminance; 3847: Maintenance; 6432: Number; 221: Operating costs
• Subject Areas: Construction; Design; Energy; Finance; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00604178
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Feb 28 1991 12:00AM