Safety impacts of differential speed limits on rural interstate highways

Details

• Creators:
  Garber, Nicholas J. ; Miller, John S. ; Yuan, Bo ; Sun, Xin
• Corporate Creators:
  Virginia Transportation Research Council (VTRC)
• Corporate Contributors:
  United States. Department of Transportation. Federal Highway Administration. Office of Safety
• Subject/TRT Terms:
  • Speed limits
  • Traffic speed measurement
  • Rural highways
  • Traffic safety
• Publication/ Report Number:
  FHWA-HRT-05-042
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Contracting Officer:
  Nedzesky, A. J.
• Corporate Publisher:
  Turner-Fairbank Highway Research Center
• Abstract:
  To compare the safety effects of a uniform speed limit (USL) for all vehicles as opposed to a differential speed limit (DSL) for cars and heavy trucks, detailed crash data, speed monitoring data, and traffic volumes were sought for rural interstate highways in 17 States for the period 1991 to 2000. Conventional statistical tests (analysis of variance, Tukey's test, and Dunnett's test) were used to study speed and crash rate changes in the four policy groups. A modified empirical Bayes formation was used to evaluate crash frequency changes without presuming a constant relationship between crashes and traffic volume.
• Format:
  PDF
• Funding:
  VRC-000S(007)
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/817/dot_817_DS1.pdf
• File Type:
  [PDF - 959.10 KB]
• Collection(s):
  Federal Highway Administration
• Main Document Checksum:
  urn:sha-512:042f7354b7eeb3be9442f8d70adebbf0f9be18e55e20c88277e1dafcb61418a8b3b0a118c9b93935a357628a7e67f6cf9355c76855646a5d56df5d19e1136066