SIDE FRICTION FOR SUPERELEVATION OF HORIZONTAL CURVES. VOLUME 1. EXECUTIVE SUMMARY REPORT. FINAL REPORT

The basic objective of this study has been to address the issue of how adequate point-mass representations are in predicting friction requirements for actual vehicles operating along superelevated curves. The project focused on this and related questions by combining computer analysis and full-scale vehicle testing. An existing comprehensive computer model used for predicting transient or nonsteady maneuvering situations was also employed to analyze friction demand while maneuvering along superelevated curves. Highway tests were then performed for two passenger cars and a five-axle tractor-semitrailer to collect representative test data and assist in validating the predictions of the computer models. Finally, a sensitivity analysis was performed to illustrate the relative importance and interactions of various vehicle parameters and highway geometrics in influencing side friction requirements.

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• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/29442
• Supplemental Notes:
  • See also Volume 2 - Final Technical Report, PB86-114915/XAB and Volume 3 - Appendices A-G, PB86-127123/XAB.
• Corporate Authors:

  University of Michigan Transportation Research Institute

  2901 Baxter Road
  Ann Arbor, MI  United States  48109-2150

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • MacAdam, C C
  • Fancher, P S
  • Segel, L
• Publication Date: 1985-8

Media Info

• Pagination: 10 p.

Subject/Index Terms

• TRT Terms: Automobiles; Forecasting; Geometric curves; Maneuvering; Sensitivity analysis; Simulation; Superelevation; Tractor trailer combinations; Traffic flow; Vehicle tests
• Uncontrolled Terms: Horizontal curvature
• Old TRIS Terms: Side friction, traffic flow
• Subject Areas: Design; Highways; Motor Carriers; Safety and Human Factors; Vehicles and Equipment; I82: Accidents and Transport Infrastructure; I95: Vehicle Inspection;

Filing Info

• Accession Number: 00469115
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FHWA/RD-86/024, UMTRI-85-18-1
• Contract Numbers: DTFH61-82-C-00019
• Files: NTL, TRIS, USDOT
• Created Date: Jun 30 1988 12:00AM