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Variable Speed Limit (VSL) - Best Management Practice [Summary]
  • Published Date:
    2012
  • Language:
    English
Filetype[PDF-352.50 KB]


Details:
  • Alternative Title:
    Variable Speed Limit ¿ Best Management Practice [Summary]
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  • Edition:
    Summary.
  • NTL Classification:
    NTL-SAFETY AND SECURITY-Speed Limits
  • Abstract:
    In variable speed limit (VSL) zones, the speed limit changes in response to traffic congestion, adverse weather, or road conditions. VSL zones are often highly automated and have been employed successfully in several U.S. and European locations. Dynamic signs display the current speed limit, adjusted according to a specific set of rules and based on data transmitted from highway sensors. Sometimes, VSL signs are paired with signs that inform drivers about road conditions or minimum speed. Ideally, approaching traffic will slow down and pass through the problem area at a slower but more consistent speed, reducing stopand- go traffic. This also reduces the probability of an accident by giving drivers more time to react to changing road conditions and helping them avoid the need to brake sharply as they approach congestion.
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