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2: Mean speed changes versus expected crash changes for rural roads and freeways 

2: Mean speed changes versus expected crash changes for rural roads and freeways 

Source publication
Technical Report
Full-text available
This report incorporates recent research, best practice examples, and jurisdictional inputs to propose a set of model national speed limit guidelines for setting speed limits at high-risk locations. The model guidelines represent a harm reduction approach to speed limits, an intermediate step towards the Safe System. The model guidelines are intend...

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Citations

Conference Paper
Full-text available
Selection of driving speeds which are safe for a given road environment is recognised as an integral tool in reducing road trauma. Safer speeds are one of the four pillars of the Safe System vision, and hence, a significant focus of speed zoning policies in Australia and New Zealand. In support of this, Austroads funded development of model national guidelines for setting speed limits based on the harm reduction approach, i.e. a step towards the Safe System objectives. The aim of this paper is to present the background, philosophy, and the process applied in the model national guidelines for setting of speed limits. These non-binding guidelines consider selection of mobility-based speed limits according to road category and function, and propose reduced limits on high-risk roads (e.g. these with substandard alignment, vulnerable road users, high frequency of intersections). Importantly, the paper also presents severe crash risk factors used to identify high-risk roads. Application of the model national guidelines is demonstrated on a case study. The paper also discusses how the future revisions of Austroads guides relating to speed limit selection may be informed by the model national guidelines.