Side Friction for Superelevation on Horizontal Curves Vol I: [Executive Summary]

Details

• Creators:
  MacAdam, C.C. ; Fancher, P. S. ; Segel, L.
• Corporate Creators:
  University of Michigan Transportation Research Institute
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Highways
  • Highway design
  • Highway curves
  • Computer models
  • Vehicle tests
  • Turning lanes
• Publication/ Report Number:
  FHWA-RD-86-024
• Resource Type:
  Brief
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Department of Transportation. Federal Highway Administration
• Description:
  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. Simple-to-use models for predicting the friction factor requirements at individual wheel locations were first developed and applied to the steady-turning condition. An existing comprehensive computer model used for predicting transient or non-steady 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 invaliding 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.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29442/dot_29442_DS1.pdf
• File Type:
  [PDF - 345.11 KB]
• Collection(s):
  US Transportation Collection ; Federal Highway Administration
• Main Document Checksum:
  urn:sha-512:1048ce58525bbe2acb611f5c1b8e7219bc65e0107f4d4c4674048a24f7acc2936478577d3c2044708904e9b348d7112406a6b8d6b4d8933c4f6c7d02f2e9f7cf