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Term of the Road Dictionary

clear zone

  • Language : PIARC Road Dictionary / English
  • Theme : Roads Design Components of the Road
  • Definition : Area adjacent to the traffic lanes that should be kept free from features that would be potentially hazardous to out-of-control vehicles. Notes:
    1. The clear zone is a compromise between the recovery area for every errant vehicle, the cost of providing that area and the probability of an out-of-control vehicle encountering a hazard.
    2. The clear zone should be kept free of non-frangible hazards where economically and environmentally possible. Alternatively, hazards within the clear zone should be treated to make them safe or be shielded by a safety barrier.

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