CHALLENGE IN TERMS OF LIGHTING
ZONE
DEFINITION
REQUIREMENTS
RISK LEVEL
- Light uniformity - Lay-out restrictions (wall mounting)
1
Area leading to the tunnel entrance
Drivers must be able to identify obstacles
ACCESS
Medium
- Prevent the black hole effect coming from the contrast - Luminaires can create a glare effect
2
Maintaining the uniformity in luminance between the access area and this zone
THRESHOLD
Tunnel entrance
High
Second part of the tunnel coming directly after the threshold zone
3
Progressively reduce the luminance to allow the human eye to adapt
Provide the right levels to enable adaptation
TRANSITION
Medium
4
Interior zone of the tunnel leading to the exit zone
INTERIOR
High uniformity to ensure safety Prevent flickering
Low
Increased luminance level to prepare the human eye to adapt to the brightness outside
5
Last section of the tunnel
EXIT
Prevent glare
High
19
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