TRAFFIC SIGNAL VISIBILITY: A PRELIMINARY STANDARD FOR ROUND SIGNAL INDICATIONS DERIVED FROM SCIENTIFIC RESEARCH

The objective of this paper is to derive a preliminary traffic signal standard for round signals based on the extensive, worldwide scientific research addressing the visibility and conspicuity requirements of traffic signals. The literature was reviewed, analyzed, summarized, and critiqued by a group of experts in visibility and related sciences, and a preliminary standard was derived from these analyses. The preliminary standard includes specifications for color, peak daytime intensity, intensity distribution, nighttime intensity and dimming, use of backplates, effects of depreciation and phantom limits for both 8-in. (200-mm) and 12-in. (300-mm) red, green, and yellow signals.

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 5-12
  • Monograph Title: Visibility for roadways, airways, and seaways 1991: proceedings of a conference, July 25-26, 1990, Washington, D.C.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00621445
  • Record Type: Publication
  • ISBN: 0309051649
  • Files: TRIS, TRB, ATRI
  • Created Date: Apr 30 1992 12:00AM