VEHICLE SPEEDS ON HIGH STANDARD CURVES

Vehicle operating speeds have been measured on 31 highway curves with design speeds in the range V80 to V120 km/h. Regression analysis showed that, for cars, 71 percent of the variability in 85th percentile curve speed could be explained in terms of curvature, sight distance, opposing flow and estimates of desired travel speed. The results of the study are discussed in terms of the assumptions underlying current geometric design practice. The regression equation is used to demonstrate the difficulty of providing superelevation and sight distance adequate for the likely operating speeds on isolated curves of 400 m radius or less.

• Record URL:
  • http://arrbknowledge.com
• Supplemental Notes:
  • Proceedings of the Eighth Conference, August 23-27, 1976, held at the University of Western Australia.
• Corporate Authors:

  ARRB

  Melbourne, Victoria  Australia 
• Authors:
  • McLean, J R
• Conference:
  • Australian Road Research Board Conference Proc
• Publication Date: 1976-8

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 1-8
• Serial:
  • Volume: 8
  • Issue Number: 8

Subject/Index Terms

• TRT Terms: Curvature; Design speed; Geometric design; Highway curves; Motor vehicles; Opposing traffic; Regression analysis; Sight distance; Speed; Superelevation; Traffic speed
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00148440
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 30 1977 12:00AM