GEOMETRIC DESIGN CRITERIA AND TRAFFIC OPERATIONAL EXPERIENCE ON HIGH SPEED FREEWAYS AND INTERCHANGES

SEVERAL YEARS AGO IRF AND FHWA DETERMINED THE NEED FOR AN IN-DEPTH STUDY OF HIGH-SPEED FREEWAYS TO PROVIDE CONCEPTS AND CRITERIA FOR FUTURE DESIGN OF FREEWAYS AND INTERCHANGES. THE 1970 EDITION OF THIS VOLUME CONTAINED A REVIEW OF STANDARDS IN THOSE EUROPEAN COUNTRIES WHERE THERE HAD BEEN THE GREATEST ACTIVITY AND INTEREST IN THE SUBJECT: FRANCE, WEST GERMANY, ITALY, THE NETHERLANDS, SPAIN, AND THE UNITED KINGDOM. IN THE PRESENT REPORT, TRENDS ARE SURVEYED, CHARACTERISTICS OF DESIGN ELEMENTS (CROSS SECTION, ALIGNMENT, HORIZONTAL CURVATURE, GRADES, VERTICAL CONDITIONS, STOPPING SIGHT DISTANCE, INTERCHANGE DESIGN AND SPACING, TRAFFIC CONTROL AND RAMP METERING, AND THE RELATION OF ACCIDENTS TO DESIGN ELEMENTS) IN THE SIX COUNTRIES ARE REVIEWED, AND THE FINDINGS ARE SUMMARIZED IN A SERIES OF TABLES. TWO CONCLUSIONS ARE DRAWN. FIRST, GEOMETRIC CHARACTERISTICS SHOULD BE DESIGNED FOR DESIRED OPERATING SPEEDS RATHER THAN FOR A DESIGN SPEED. SECOND, BECAUSE OF THE RELATION OF INDIVIDUAL CHARACTERISTICS TO OVERALL ROAD PERFORMANCE, UNIFORM STANDARDS SHOULD BE ESTABLISHED FOR SUCH ELEMENTS AS ACCELERATION AND DECELERATION LANES, DISTANCE BETWEEN MERGING AND DIVERGING POINTS, OFF-AND ON-RAMPS, AND ADVANCE SIGNING.

  • Corporate Authors:

    International Road Federation

    525 School Street, SW
    Washington, DC  USA  20024
  • Authors:
    • Taragin, A
  • Publication Date: 1972-12

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 296-331

Subject/Index Terms

Filing Info

  • Accession Number: 00203768
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 1973 12:00AM