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What is Tunnel Lighting?

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Electrical Engineer
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China


What is Tunnel Lighting?


Tunnel Lighting Design Definition


Tunnel lighting design is about creating a lighting plan that helps drivers’ eyes adjust to the tunnel environment for safety and comfort.



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Adaptability Criteria


Lighting must transition gradually from high to low levels to help drivers’ eyes adjust smoothly when entering or exiting the tunnel.


 

40 m Length Rule


The first 40 meters of a tunnel should be designed to let in daylight and ensure visibility of objects inside.


 

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Classification of Inside Road Length of Tunnel


 

  • Threshold zone

  • Transition zone

  • Interior zone

  • Exit zone



 

Threshold Zone Lighting


Special lighting at the tunnel entrance helps drivers’ eyes adjust from bright daylight to lower interior light levels.


 

Interior Zone Lighting


The interior zone maintains a higher constant luminance level than open road lighting to ensure safety in confined spaces.


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