THE DESIGNING OF INTERSECTION CHANNELIZATION

INTERSECTIONS CAUSE MANY OF THE CRITICAL PROBLEMS IN HIGHWAY TRAFFIC OPERATIONS AND CONTROL. WHERE THE INTERSECTION IS AT GRADE, STREAMS OF TURNING AND CROSSING VEHICLES MUST JOIN AND CROSS EACH OTHER. THE POINTS WITHIN THE INTERSECTIONAL AREA USED IN COMMON BY INTERSECTING STREAMS ARE FOCAL POINTS OF ACCIDENTS AND DELAY. DELAYS RESULT WHEN VEHICLES IN DIFFERENT STREAMS WISH TO PASS THROUGH THESE FOCAL POINTS AT THE SAME TIME. ACCIDENTS RESULT WHEN DRIVERS MAKE MISTAKES IN JUDGEMENT OF THE TIME AND PLACE THAT INTERSECTING MOVEMENTS WILL OCCUR. THE TIME AND PLACE OF CONFLICTS AT INTERSECTIONS MAY BE ALTERED BY TRAFFIC CONTROLS OR DESIGN. TRAFFIC SIGNALS SEPARATE INTERSECTING TRAFFIC STREAMS BY ALLOTTING DIFFERENT TIMES FOR VEHICLES TO USE THE INTERSECTION. GRADE SEPARATIONS ELIMINATE THE PLACE OF CONFLICT BY BRIDGING ONE STREAM OVER THE OTHER. CHANNELIZATION IS THE ESTABLISHMENT OF TRAFFIC CHANNELS WITHIN, AND UPON THE APPROACHES OF, INTERSECTIONS TO CONTROL THE SPEED AND PATH OF VEHICLES. THROUGH CHANNELIZATION, THE PLACE OF CONFLICT BETWEEN INTERSECTING TRAFFIC STREAMS MAY BE CONTROLLED AND THE TIME ELEMENT MAY BE INFLUENCED BY THE SEPARATION OF CONFLICT POINTS AND CONTROL OF THE ANGLE AND SPEED AT WHICH CONFLICTS OCCUR. CHANNELING APPLIES TO ALL TYPES OF INTERSECTIONS. IT ENJOYS ITS FULLEST APPLICATION IN SUBURBAN AREAS WHERE SPEEDS ARE MODERATE AND THE LARGER SPACE REQUIRED BY CHANNELIZATION MAY BE OBTAINED AT REASONABLE COST. IN URBAN AREAS, THIS ADDITIONAL SPACE IS FREQUENTLY TOO EXPENSIVE TO ACQUIRE. IN RURAL AREAS, HIGH SPEEDS CALL FOR GENEROUS DIMENSIONS THAT MAY BE PROHIBITIVE WITH THE RESULT THAT ONLY PARTIAL OR LIMITED CHANNELIZATION IS PRACTICAL. THE DESIGN PRINCIPLES OF CHANNELIZATION ARE FLEXIBLE IN APPLICATION. USE OF ALL, OR A FEW, OF THE PRINCIPLES DEPENDS UPON THE PHYSICAL AND TRAFFIC FACTORS ENCOUNTERED AT INDIVIDUAL INTERSECTIONS. /AUTHOR/

  • Availability:
  • Corporate Authors:

    Eno Transportation Foundation

    1250 I Street, NW, Suite 750
    Washington, DC  USA  20005
  • Authors:
    • Hurd, F W
  • Publication Date: 1950-1

Media Info

  • Pagination: p. 89-101
  • Serial:
    • Traffic Quarterly
    • Volume: 4
    • Issue Number: 1
    • Publisher: Eno Transportation Foundation
    • ISSN: 0041-0713

Subject/Index Terms

Filing Info

  • Accession Number: 00203273
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 10 2001 12:00AM