USE OF CHANGEABLE-MESSAGE SIGNS BY PORT AUTHORITY

THE ADVANTAGES AND DISADVANTAGES OF USING BLANK-OUT ARROWS AND X'S, MATRIX SIGNS, DRUM TYPE SIGNS, AND MANUAL FLIP SIGNS ARE BRIEFLY COVERED. BLANK-OUT ARROWS AND X'S ARE USED TO INDICATE LANE OPENINGS AND CLOSURES, HOWEVER, THEY ARE DIFFICULT TO SEE UNDER DIRECT SUNLIGHT. MATRIX SIGNS CAN BE UTILIZED TO CONVEY AN UNLIMITED NUMBER OF MESSAGES, BUT THE NEW STANDARDS DESIGNED BY THE MANUAL OF UNIFORM TRAFFIC CONTROL DEVICES FOR STREET AND HIGHWAYS MAY LIMIT THE EFFECTIVENESS OF THESE SIGNS. DRUM TYPE SIGNS CAN BE USED TO CHANGE COLORS AND YET COMPLY WITH THE NEW MANUAL'S STANDARDS FOR COLOR REQUIREMENTS, HOWEVER, THE SIGN IS LIMITED BY THE NUMBER OF MESSAGES THAT CAN BE PRESENTED PER DRUM. MANUAL FLIP SIGNS CAN BE PRODUCED QUICKLY AND INEXPENSIVELY, BUT ARE SELDOM CHANGED PROMPTLY TO CONFORM TO LOCAL TRAFFIC CONDITIONS.

Media Info

  • Media Type: Print
  • Pagination: p. 17-19
  • Monograph Title: THE CHANGEABLE-MESSAGE CONCEPT OF TRAFFIC CONTROL
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00226388
  • Record Type: Publication
  • ISBN: 0309020530
  • Files: TRIS, TRB, ATRI
  • Created Date: Jan 29 1973 12:00AM