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Few, if any, motorists take notice of tunnels; their prime objective is to get to the other end as quickly and safely as possible and fewer still reflect on the construction and maintenance that is required to keep them at the right standard.
A high standard of lighting is a priority: too bright, and the lamps or lights may dazzle or distract drivers; too dim, and the tunnel can seem claustrophobic and daunting, as well as increase dangers from obstructions and other hazards. The solution, which is designed-in by the architect and civil engineer, is to use the walls of the tunnel to reflect artificial light and create a ‘false’ ambient lighting effect.
Click here to read the full article that appeared in 'Highways Magazine'.