Canadian Guidelines for Establishing Posted Speed Limits

Canadian Guidelines for Establishing Posted Speed Limits were developed to provide guidance and to enhance consistency in the evaluation of posted speed limits. The guidelines were developed through the review of current domestic and international practices, technical documentation and testing. Road safety may be enhanced through credible posted speed limits that match the expectation of drivers for a given roadway and its surrounding area. The guidelines provide engineers and traffic practitioners with an evaluation tool to assess appropriate posted speed limits based primarily on the classification, function and physical characteristics of a roadway. It is an objective assessment based on engineering factors. The risks associated with the engineering factors determine the appropriate posted speed limit. The higher the level of risk, the lower the recommended posted speed limit. For all categories of roadways, the application of the methodology results in posted speed limits that are consistent with the roadways' physical characteristics. An automated spreadsheet is provided to facilitate the evaluation of posted speed limits. Local policies or procedures for setting and managing posted speed limits may exist, and they govern when in effect. When the recommended speed limit from the guidelines is lower than the posted speed limit dictated by policy, a review of the applicability of the policy may be prudent. There are also unique circumstances related to a roadway's characteristics that warrant more specific guidance with regards to setting posted speed limits.

  • Corporate Authors:

    Transportation Association of Canada (TAC)

    Ottawa, Ontario  Canada 
  • Authors:
    • LAW, V
    • ZEIN, S
  • Publication Date: 2009


  • English

Media Info

  • Pagination: vi, 68 p.

Subject/Index Terms

Filing Info

  • Accession Number: 01149475
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • Files: TAC
  • Created Date: Jan 28 2010 7:31AM