ROAD TRANSITION CURVES FOR AN ACCELERATING VEHICLE

THE GEOMETRIC DESIGN OF ROAD CURVES IS DISCUSSED FOR SITUATIONS WHERE THE DESIGN VEHICLE CANNOT BE REGARDED AS TRAVELLING AT A CONSTANT SPEED, SUCH AS ON APPROACH TO, OR EXIT FROM, A LOOP OF A GRADE-SEPARATED INTERCHANGE. THE EQUATIONS OF TWO CURVES ARE GIVEN, THE FIRST OF CONSTANT RATE OF INCREASE OF RADIAL ACCELERATION, CORRESPONDING TO THE CLOTHOID IN CONSTANT-SPEED DESIGN, AND THE SECOND OF CONSTANT RADIAL ACCELERATION, WHICH THUS CORRESPONDS TO THE CIRCLE FOR CONSTANT SPEED. IT IS ASSUMED THAT THE DESIGN VEHICLE HAS A CONSTANT ACCELERATION ALONG THE CURVE. AN EXAMPLE OF EACH CURVE IS TABULATED AND RECOMMENDATIONS ARE MADE FOR THEIR USE IN PRACTICE. /RRL(A)/

  • Supplemental Notes:
    • Vol 18, No 3, PP 7-16, 8 FIG, 6 TAB, 8 REF
  • Corporate Authors:

    Institute of Highway Engineers

    3 Lygon Place, Ebury Street
    London SW1,   England 
  • Authors:
    • HEWITT, R H
  • Publication Date: 1971-3

Subject/Index Terms

Filing Info

  • Accession Number: 00203329
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Nov 15 1971 12:00AM