To investigate an appropriate lighting system for safe evacuation of passengers from tunnels and to compare three types of lamps--fluorescent, high-pressure mercury and high-efficiency sodium--in transmittance through fire and smoke and as normal tunnel illumination, measurements were carried out. Also checked was the visibility in smoke of indicator lamps showing location of telephones and other facilities. As a result of test, a 40-watt fluorescent lamp was chosen for tunnel illumination and a 20-watt fluorescent for indicator lamps. Through these tests, it has been made clear that even if surface luminance of an indicator lamp exceeds 1000 cd/sq m, the threshold smoke density does not increase correspondingly.

  • Availability:
  • Corporate Authors:

    Ken-yusha, Incorporated

    1-45-6 Hikari-cho, Kokubunji-shi
    Tokyo,   Japan 
  • Authors:
    • Tanaka, H
    • Takaoka, S
  • Publication Date: 1974

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00057860
  • Record Type: Publication
  • Source Agency: Railway Technical Research Institute
  • Report/Paper Numbers: Quart. Rpt
  • Files: TRIS
  • Created Date: Nov 12 1981 12:00AM