UNIT CURVE FOR HIGHWAY TRANSITION SPIRAL

A UNIT CURVE IS DEVELOPED FOR THE DESIGN OF A HIGHWAY TRANSITION SPIRAL. FOR ANY SPIRAL ANGLE, CORRESPONDING LENGTHS OF THE UNIT CURVE AND A GIVEN FIELD TRANSITION CURVE BEAR A CONSTANT RATIO WHICH IS TERMED THE CHARACTERISTIC CONSTANT OF THE FIELD CURVE. THE CONSTANT IS A FUNCTION OF THE CHOSEN MINIMUM RADIUS AND THE TOTAL LENGTH OF THE FIELD SPIRAL. THE CARTESIAN CO-ORDINATES FOR A PARTICULAR LENGTH OF THE FIELD CURVE ARE EQUAL TO THE CONSTANT TIMES. THE CARTESIAN CO-ORDINATES OF THE CORRESPONDING LENGTH OF THE UNIT CURVE, AND THE DEFLECTION ANGLE IS THE SAME FOR BOTH. THE USE OF THE UNIT CURVE VERY MUCH SIMPLIFIES THE DESIGN OF A HIGHWAY TRANSITION SPIRAL. /AUTHOR/

• Record URL:
  • http://arrbknowledge.com
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00050164
• Authors:
  • RAO, S K
• Publication Date: 1973-4

Media Info

• Pagination: p. 45-54
• Serial:
  • Australian Road Research
  • Volume: 5
  • Issue Number: 1
  • Publisher: ARRB
  • ISSN: 0005-0164

Subject/Index Terms

• TRT Terms: Coordinates; Highways; Ratios; Spirals; Transition curves
• Subject Areas: Design; Highways;

Filing Info

• Accession Number: 00203844
• Record Type: Publication
• Files: TRIS, ATRI
• Created Date: Dec 22 1973 12:00AM