AN EVALUATION OF THE AUSTROADS HORIZONTAL CURVE DESIGN STANDARDS FOR NEW ZEALAND

It is often necessary for countries to adopt geometric design standards developed elsewhere. However, the question often arises as to whether or not these standards are able to adequately predict the behaviour of local drivers. This paper presents an evaluation of the appropriateness of the Australian geometric design standards for New Zealand. Using speed data collected at 34 curve sites, a number of different analyses were undertaken. It was found that 85th percentile curve speed was higher than the curve design speed. This was confirmed from the side friction factor use which was often higher than the design side friction factor. The observed 85th percentile curve speeds were higher than those predicted by the design procedure and the data suggested that the high-speed environment design curves could be extrapolated to lower radii. An evaluation of curve speed versus posted advisory speed showed that drivers were consistently driving curves at speeds 10 to 28 km/h higher than the posted advisory speed. (a)

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 54-63
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00674658
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Mar 8 1995 12:00AM