What is Tunnel Lighting?

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.

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.

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.