Warrants for the installation of traffic signals at intersections have been developed during an extensive period, particularly in North America. The available references are reviewed briefly in this paper, and further consideration is given to the subject of traffic accidents within the context of establishing warrants. The results of previous research have shown that significant reductions in accident are obtained after installation at locations where there was a history of right-angled collisions. A graphical warrant is developed to relate traffic accidents, represented by an annual accident rating, with a traffic conflict factor derived from peak-hour traffic counts. The graph also indicates zones where traffic signals are not justified, but less restrictive means of traffic control may be applied at an intersection. The data collected in establishing warrants may also be applied to develop priorities among a group of locations where traffic signals are expected to be required. The application of ranking methods is indicated to determine a list of priorities for intersections where warrants have been established.

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 144-159
  • Serial:
    • Volume: 6
    • Issue Number: Pt3

Subject/Index Terms

Filing Info

  • Accession Number: 00080612
  • Record Type: Publication
  • Source Agency: National Safety Council Safety Research Info Serv
  • Files: TRIS, ATRI
  • Created Date: Mar 6 1975 12:00AM