CHANGEABLE-MESSAGE SIGNS

THREE TYPES OF CHANGEABLE MESSAGE SIGNS ARE DESCRIBED. THE LAMP MATRIX IS A LOW-VOLTAGE, LONG-LIFE LAMP WITH A VERY BRIGHT SPOTLIGNT THAT CAN BE REGULATED; THE MESSAGE UNIT CAN BE ADJUSTED FOR DIFFEERENT SIZES AND FOR FLASH TYPE MESSAGES. THE TWO BASIC SYSTEMS FOR CONTROLLING THE ELECTRONIC CIRCUITS WITHIN MATRIX SIGNS ARE BRIEFLY DISCUSSED - THE UMF AND ICUM APPROACHES. THE DRUM SIGN IS LIMITED BY THE NUMBER OF MESSAGES THAT CAN BE CONTROLLED ON ONE DRUM OR A GROUP OF DRUMS. REGULAR MAINTEANCE IS REQUIRED FOR THE MECHANICAL ASPECTS OF THE SIGN, GEAR-DRIVE MOTORS, AND THE HEATERS IN WINTER. LEGENDS CAN BE REFLECTORIZED, HOWEVER, AND THE BACKGROUND AND COLOR OF EACH MESSAGE CAN VARY. THE BLANK-OUT SIGN PROVIDES ONE MESSAGE OR NO MESSAGE ON A SINGLE SIGN FACE WITH A PAINTED MESSAGE. THE LIGHTING FLOURESCENT TUBES OR NEON TUBES--STRUCTURE COMBINED WITH ITS SIMPLE CONSTRUCTION AND LOW COST OFFER SEVERAL ADVANTAGES.

Media Info

  • Media Type: Print
  • Pagination: p. 26-28
  • Monograph Title: THE CHANGEABLE-MESSAGE CONCEPT OF TRAFFIC CONTROL
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00226391
  • Record Type: Publication
  • ISBN: 0309020530
  • Files: TRIS, TRB, ATRI
  • Created Date: Feb 3 1973 12:00AM