SAFETY EFFECTS OF THE 65 MPH SPEED LIMIT AND THE MANDATORY SEAT BELT LAW. FINAL REPORT

This study consisted of several tasks to measure the safety effects of the 65 mph speed limit, effective in Georgia in February 1988, and the mandatory seat belt law, effective September 1988. Before and after periods were used in the analysis of fatalities, fatal accidents, and injuries for different highway classifications. The researchers found no significant effect of the 65 mph speed limit on the occurrence of fatal accidents and fatalities on the Rural Interstate system in the six month period after the law. Time series analyses revealed significant increases in fatalities beginning about nine months after the effective date of the speed limit increase. There was also a significant increase in reported injuries on the Rural Interstates after the speed limit increase. Statistical analyses using odds ratios compared accident experience in a six month period before the seat belt law to the experience in a six month period after the law. The results failed to show any significant decrease in the number of fatalities or fatal accidents. However, time series analyses of reported injuries showed that the seat belt law had a beneficial effect.

  • Corporate Authors:

    University of Georgia, Experiment

    Georgia Experiment Station
    Experiment, GA  United States 

    Governor's Office of Highway Safety

    P.O. 1497
    Atlanta, GA  United States  30301

    Georgia Department of Transportation

    One Georgia Center
    600 West Peachtree Street, NW
    Atlanta, GA  United States  30308

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • WRIGHT, P
    • Sarasua, W
  • Publication Date: 1991-9

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 126 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00618137
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/GA/91/8904
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Dec 31 1992 12:00AM