CHANNELIZATION

THE APPROACH-END TREATMENT OF CHANNELIZATION IS STUDIED WITH PARTICULAR EMPHASIS PLACED ON DRIVERS VISIBILITY UNDER CONDITION OF NIGHT DRIVING IN ADVERSE WEATHER. STUDIES WERE CONDUCTED TO DETERMINE THE RELATIVE VISIBILITY AND SERVICEABILITY OF MARKING MATERIALS FOR DELINEATING CHANNELIZATION ISLANDS. RAISED MARKINGS CONSTRUCTED WITH A SLURRY MIXTURE WERE THE MOST SATISFACTORY OF THE DEVICES TESTED. THEY PROVIDED STRIPES OF SUFFICIENT HEIGHT TO CAUSE AN ADEQUATE VEHICLE RUMBLE AND PRESENTED A CONVENIENT SURFACE TEXTURE FOR VISIBILITY PURPOSES. OTHER STUDIES WERE PERFORMED TO EVALUATE THE RELATIVE VISIBILITY AND LEGIBILITY OF SIGNS USED TO DIRECT TRAFFIC AROUND THE APPROACH-ENDS OF CHANNELIZING ISLANDS. EIGHT DIFFERENT SIGNS WERE USED. THEY WERE SIMILAR IN GEOMETRIC CONFIGURATION BUT DIFFERED IN THE TYPES OF MATERIALS USED AND THE METHODS OF ILLUMINATION. THE MOST SATISFACTORY SIGNS TESTED HAD PRISMATIC REFLECTORS OR REFLECTIVE SHEETING ON A BLACK BACKGROUND. THE SAFETY ASPECTS OF CHANNELIZATION WERE INVESTIGATED BY COMPARING TRAFFIC ACCIDENT DATA BEFORE AND AFTER CHANNELIZATION WAS INSTALLED ON AN ARTERIAL STREET. THE RESULTS OF THE ANALYSIS INDICATE A FAVORABLE EFFECT OF CHANNELIZATION ON TRAFFIC ACCIDENTS. A COMPUTER PROGRAM WAS DEVELOPED TO TRANSLATE DESIGN DATA INTO A PERSPECTIVE VIEW OF THE ROADWAY; IN ORDER TO HELP THE DESIGNER IN CONTROLLING THE APPROACH PROFILE TO IMPROVE THE VISIBILITY ASPECTS OF THE INTERSECTION. HOWEVER, THIS TECHNIQUE IS STILL IN THE DEVELOPMENT STAGE. /BPR/

  • Supplemental Notes:
    • Hpr, 19
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011
  • Authors:
    • Rowan, N J
    • Williams, T G
  • Publication Date: 1966-3

Media Info

  • Pagination: 59 p.
  • Serial:
    • Wilson, TG
    • Publisher: Texas Transportation Institute

Subject/Index Terms

Filing Info

  • Accession Number: 00203124
  • Record Type: Publication
  • Report/Paper Numbers: Research Rpt. 19-4
  • Files: TRIS
  • Created Date: Aug 1 1994 12:00AM