HONG KONG TUNNEL

THIS ARTICLE DESCRIBES THE LIGHTING SYSTEM USED IN THE HONG KONG TUNNEL. THE 1885M LONG TUNNEL HAS A DAILY CAPACITY OF 80,000 VEHICLES. DIMENSIONS OF THE TUNNEL ARE GIVEN. ONE CONTINUOUS ROW OF TWIN-LAMP LUMINAIRES, RECESSED IN THE CENTRE OF THE TUNNEL CEILING, GIVE THE BASIC LIGHTING. THE LUMINAIRES ARE GROUPED IN SETS OF 11 AND THEY CONTINUALLY PROVIDE SMOOTH VISUAL ADAPTATION, WITHOUT GLARE FOR DRIVERS ENTERING OR LEAVING THE TUNNEL AT EITHER END. THE MAXIMUM AVERAGE LUMINANCE IS 265LUX. THE USE OF THRESHOLD, TRANSITION AND EXIT ZONES IS DESCRIBED. A 6% REDUCTION IN EXTERNAL DAYTIME ILLUMINATION AT THE TUNNEL ENTRANCE IS ACHIEVED BY USE OF A LOUVERED CANOPY IN THE THRESHOLD ZONE. THE AVERAGE ILLUMINANCES IN THE VARIOUS ZONES ARE AUTOMATICALLY ADJUSTED TO THE OUTSIDE ILLUMINANCE BY SWITCHES AND DIMMERS CONTROLLED BY PHOTOCELLS. THREE PHASES OF OUTDOOR LIGHTING LEVELS CAN BE DISTINGUISHED. POWER IS SUPPLIED BY A DIESEL GENERATOR IN AN EMERGENCY. A VENTILATION PLANT SUPPLIES 10M3 OF FRESH AIR/MINUTE/METRE OF TRAFFIC LANE. TRAFFIC CONTROL AND SAFETY SYSTEMS ARE LISTED. MANY PHOTOGRAPHS OF THE LIGHTING SYSTEM ARE INCLUDED.

  • Availability:
  • Corporate Authors:

    Foundation Prometheus

    P.O. Box 784
    Amsterdam,   Netherlands 
  • Publication Date: 1973

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 132-137
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00080875
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 26 1975 12:00AM