A QUANTITATIVE EVALUATION OF THE GEOMETRIC ASPECTS OF HIGHWAYS

A DETAILED STUDY WAS UNDERTAKEN OF VEHICLE SPEEDS ON AN ACTUAL ROAD CURVE. A PILOT STUDY WAS CARRIED OUT, AND THIS WAS EXTENDED TO INCLUDE THE FOLLOWING GEOMETRIC FEATURES' 5 1/4 DEG HORIZONTAL CURVE, A RIGHT-ANGLE TURN, TRANSITION SECTION FROM 4 LANES TO 2 LANES, A MERGING LINE AND A NARROW BRIDGE. IT WAS FOUND THAT THE MODULUS OF GEOMETRIC ASPECTS PROVIDES A REPRODUCIBLE QUANTITATIVE RATING OF THE EASE OF TRAFFIC FLOW THROUGH ALL GEOMETRIC FEATURES EXCEPT THOSE REQUIRING VERY SEVERE SPEED CHANGES. /RRL/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1965/83/83-002.pdf
• Supplemental Notes:
  • 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:
  • Tharp, Kenneth John
  • Harr, Milton Edward
• Publication Date: 1965

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 29-44
• Monograph Title: Geometric design and barrier rails
• Serial:
  • Highway Research Record
  • Issue Number: 83
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Alignment; Bridges; Curves (Geometry); Geometric design; Highways; Merging traffic; Quantitative analysis; Roads; Speed; Traffic flow; Traffic lanes; Vehicles
• Uncontrolled Terms: Horizontal curvature; Lane; Transition zones
• Old TRIS Terms: Narrow objects; Right angle intersection
• Subject Areas: Bridges and other structures; Design; Highways; Operations and Traffic Management; Vehicles and Equipment;

Filing Info

• Accession Number: 00227041
• Record Type: Publication
• Report/Paper Numbers: HS-006 579
• Files: TRIS, TRB
• Created Date: Aug 13 2004 6:56PM