A number of treatments for making signs more conspicuous were compared in a laboratory experiment. Three involved placing the sign on a plain square backing board (three colours were tested: black, light grey and yellow) and a fourth used a larger version of the sign having the same area as the basic sign plus backing board. Slides showing the signs against three backgrounds were projected on a screen for fixed time periods of between 100 and 250 msecs. Subjects were required to locate the signs while performing a continuous steering task. The most effective overall treatment was the use of a yellow backing board. This and the grey board were about equally good against foliage and grey was only marginally inferior against a street scene with potentially distracting coloured detail. However, against a background with high luminance contrast, tree trunks seen against a bright sky, the yellow board was markedly superior to any of the other treatments. It is concluded that the contrast between backing board and background is a more important factor in determnning conspicuity than sign size. (a)

  • Availability:
  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 
  • Authors:
    • Cooper, B R
  • Publication Date: 1988


  • English

Media Info

  • Pagination: 8 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00499000
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: RR 157
  • Files: ITRD, TRIS, ATRI
  • Created Date: Sep 30 1990 12:00AM