Practice question

What is 'counter-beam' lighting in tunnel applications?

  1. Lighting that opposes the traffic flow direction
  2. A technique where luminaires are aimed against the direction of traffic to illuminate the front faces of vehicles and objects, improving their visibility to approaching drivers
  3. Using beams of light to count vehicles
  4. A method of blocking light from entering the tunnel

Answer: B — A technique where luminaires are aimed against the direction of traffic to illuminate the front faces of vehicles and objects, improving their visibility to approaching drivers

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