This report is mainly a literature study of the relations between traffic safety and chronic medical conditions and physical impairments among drivers. It is not known how many accidents are caused by illness of drivers. In some investigations, one has tried to find the percentage of accidents that are caused by sudden illness of the driver. This percentage varies somewhat between investigations, but 0.2% seems to be a reasonable estimate. Several researchers have investigated whether drivers with a chronic medical condition have more accidents than other drivers. Investigations carried out in California and Washington indicate that these drivers have more than their share of accidents. On the other hand Swedish investigations find that drivers with a chronic medical condition have less than their share of accidents. The Swedish investigations included very few drivers with epilepsy. All investigations indicate that the accident risk increases when the medical condition is more serious. This may be related to the different results of the Swedish and American investigations. It is possible that there is a better or stricter medical control of drivers in Sweden than in California. The investigations show that it is possible to find the drivers who represent a high accident risk. These drivers should be prevented from driving. The results indicate that this has been achieved in Sweden. A few researchers have investigated the relation between traffic accidents and physical impairment of drivers. All find that these drivers do not have more accidents than others. /TRRL/

  • Availability:
  • Corporate Authors:

    Norwegian Institute of Transport Economics

    Gransesvingen 7, P.O. Box 6110, Etterstad
    Oslo,   Norway  N-0602
  • Authors:
    • Glad, A
  • Publication Date: 1977-10


  • Norwegian

Media Info

  • Features: References; Tables;
  • Pagination: 36 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00180012
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Monograph
  • Files: ITRD, TRIS
  • Created Date: Sep 27 1978 12:00AM