Change in Victorian accident frequency with the introduction of the 100 km/h absolute speed limit in 1974

The comparative trends in Victorian road accidents and rural speeds are analysed in relation to the introduction of an absolute speed limit of 100 km/h in 1974. It is shown that a reduction in free speed and range in 1974 was followed by a reversion in 1975 and 1976 towards but not attaining values found in the period prior to the implementation of the legislation. Reported casualty accidents likewise showed a reduction, of 10-14 per cent in 1974 relative to 1973 particularly for single vehicle involved accidents with a marked reduction of 19.6 Per cent in high compared with 5.3 Per cent in low speed zones. Although no causal link between vehicle free speed and accident frequency could be statistically established, the changes in both factors over the period are in agreement with such a mechanism. This suggests that the introduction of the 100 km/h absolute speed limit in Victoria contributed at least in part to the 1974 downturn in reported casualty accidents.


  • English

Media Info

  • Pagination: 158-70
  • Monograph Title: Procedures for analysis of traffic flow patterns using detector loops
  • Serial:
    • Volume: 10
    • Issue Number: 4

Subject/Index Terms

Filing Info

  • Accession Number: 01439196
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 24 2012 10:04PM