INSTABILITY ANALYSIS OF A VEHICLE NEGOTIATING A CURVE WITH DOWNGRADE SUPERELEVATION

THIS STUDY WAS INITIATED AS A RESULT OF NUMEROUS SKIDDING ACCIDENTS OCCURRING AT LOCATIONS WHERE HIGHWAY GEOMETRICS INCLUDE A COMBINATION OF DOWNGRADE, CURVE, AND SUPERELEVATION. MATHEMATICAL EQUATIONS ARE DEVELOPED FOR OBTAINING ALL THE WHEEL FORCES (BOTH NORMAL AND LATERAL) OF A VEHICLE NEGOTIATING SUCH A CURVE AT THE INSTANT OF INCIPIENT SKIDDING FOR A VARIETY OF PARAMETERS. FACTORS THAT APPEAR TO BE MOST IMPORTANT IN REGARD TO CRITICAL SKIDDING VELOCITIES ARE THE LATERAL COEFFICIENT OF FRICTION BETWEEN THE TIRE AND THE ROAD SURFACE AND DRIVER MANEUVERING. FACTORS THAT APPEAR TO HAVE LITTLE INFLUENCE ARE SUPERELEVATION (IF RELATIVELY SMALL), CROSSWIND VELOCITY, AND TYPE OF VEHICLE (EXCLUDING TRACTOR-TRAILERS). /AUTHOR/

Media Info

  • Media Type: Print
  • Features: References; Tables;
  • Pagination: p. 40-44
  • Monograph Title: Geometric design implications and vehicle noise
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00223882
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 19 1972 12:00AM