Determination of the effects of structural properties on tunnel lighting with examples from Turkey

Sermin Onaygil, Öonfer Güler*, Emre Erkin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


In this work, effects of the structural measures during the construction phase on the tunnel lighting have been studied. The luminance of the access and threshold zones of the tunnel are obtained from the photos taken from the entrances of Gultepe and Diliskelesi Tunnels located on the Istanbul-Ankara TEM motorway in Turkey according to the CIE Publication No. 88. Then the effects of the tunnel surroundings, direction, traffic speed, road pavement and portal design on the tunnel-lighting design-criteria have been investigated by using real tunnel entrance photos taken from certain distances and/or computer generated images. Consequently, it has been explained that significant decreases in the tunnel illumination levels can be achieved by taking the structural measures in tunnels.

Original languageEnglish
Pages (from-to)85-91
Number of pages7
JournalTunnelling and Underground Space Technology
Issue number1
Publication statusPublished - Feb 2002


  • Access zone luminance
  • Conical field
  • Pavement properties
  • Portal types
  • Safe-stopping-sight-distance
  • Threshold zone luminance
  • Traffic speed
  • Tunnel direction


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