Accidents at roundabouts were analyzed with respect to: speed limit, urban area, rural area, type of accident, course of accident, lighting condition, road condition and time of day. The following conclusions were drawn: the number of accidents at roundabouts does not differ from that at other junctions with corresponding traffic flow, number of intersection legs and speed limits, the number of injuries sustained is low compared to other junctions: the proportion of accidents involving more than one traffic unit is smaller than at other junctions, while the proportion of single accidents is larger. No relationships between traffic flow and speed limit or traffic flow and accident rate were established. However, it is not impossible that differences in accidents between various speed limits and degrees of urbanization could depend on differences in traffic streams or in geometric design. The results indicate that the majority of accidents was caused by fast driving. /TRRL/

  • Corporate Authors:

    Swedish National Road Administration

    Fack S-10220
    Stockholm 12,   Sweden 
  • Authors:
  • Publication Date: 1978-6


  • Swedish

Media Info

  • Features: Figures; Tables;
  • Pagination: 24 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00184457
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Internal Report 31 Monograph
  • Files: ITRD, TRIS
  • Created Date: Jan 13 1979 12:00AM