TRIALS WITH DIFFERENTIATED SPEED LIMITS DURING THE YEARS 1968-1972

Trials with speed limits differentiated according to the standard of the roads have been run in Sweden since 1968. In the course of these trials, the entire road network has been regulated by speed limits indicated by road signs, with roads of good standard being permitted higher speed limits than roads of poor standard. The speed limits tested on motorways are 130 and 110 km/h. On two-lane roads the speed limits tested were 110, 90 and 70 km/h. The speed limits represent maximum limits. Concerning the total number of accidents each reduction has been found to be associated with a reduction in the number of accidents as well as a decrease in resultant injuries. The change of the speed limit from 90 to 110 km/h on two-lane road of very high standard has led to an increase in the accident rate-- number of accidents per million axle-pair kilometr--with about 40%. Reduction in the speed limit from 90 to 70 km/h has led to a decrease in the accident rate corres- sponding to 22% and the reduction in the speed limit on motorways from 130 to 110 km/h has led to a decrease in the accident rate with 30%. Speed measurements carried out in connection with the various trials showed a reduction in the speed of 20 km/h led to an average reduction in the speeds of a 6 to 8 km/h. /Author/

  • Corporate Authors:

    Swedish National Road and Transport Research Institute (VTI)

    Olaus Magnus vaeg 35
    Linkoeping,   Sweden  SE-581 95
  • Authors:
    • Nilsson, G
  • Publication Date: 1977

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 21 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00155962
  • Record Type: Publication
  • Report/Paper Numbers: Report No. 117A
  • Files: TRIS
  • Created Date: Sep 28 1977 12:00AM