SAFE SIDE FRICTION FACTORS AND SUPERELEVATION DESIGN

IN PART I ABOUT 900 ROAD TESTS ARE REPORTED, DEALING WITH CURVATURE, SUPERELEVATION, AND THE SPEED AT WHICH SIDE PITCH IS FELT FIRST. THE PROPOSAL IS MADE IN PART II THAT HIGHWAYS BE SUPERELEVATED TO COUNTERACT WHERE POSSIBLE ALL CENTRIFUGAL FORCE FOR A SPEED OF 3/4 THE ASSUMED DESIGN SPEED, WITH THE FOLLOWING RESULTS AS COMPARED TO SUPERELEVATING TO COUNTERACT ALL CENTRIFUGAL FORCE FOR ALL OF THE ASSUMED DESIGN SPEED: AID TO SLOWER MOVING VEHICLES WITHOUT PENALIZING FASTER ONES; A SAFER HIGHWAY WHEN ALL TRAFFIC MOVES SLOWLY DUE TO SLIPPERY PAVEMENTS; NO EFFECT ON FUTURE REDESIGN TO REASONABLY HIGHER SPEEDS; AND GREATER UNIFORMITY IN THE DESIGN OF CURVES OF WIDELY DIFFERENT RADII. /AUTHOR/

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/16/16-004.pdf
• Supplemental Notes:
  • Vol 16, pp 69-80, 9 FIG. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Barnett, J
  • Haile, E R
  • Moyer, R A
• Publication Date: 1937

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Sixteenth Annual Meeting of the Highway Research Board Held at Washington, D.C. November 18-20, 1936
• Serial:
  • Highway Research Board Proceedings
  • Volume: 16
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Centrifugal force; Curvature; Pavements; Pitch (Dynamics); Safety; Slipperiness; Speed; Superelevation; Traffic flow
• Old TRIS Terms: Side friction /traffic flow/
• Subject Areas: Design; Highways; Pavements; Safety and Human Factors;

Filing Info

• Accession Number: 00203485
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 8 1971 12:00AM