This report provides details of accident studies into injury accidents at traffic signal installations carried out by the Highway Authorities in England, Scotland and Wales since 1974. A questionnaire was sent to all Highway Authorities regarding information about any individual sites at which treatment had been carried out. The details of each study which are recorded are as follows: date; authority name and contact point; extent of accident data; site characteristics; accident factors examined; effect of traffic flows; statistical tests; and main results. A summary of the findings is also presented. The results show that there is no guaranteed safety benefit provided by the installation, modification or replacement of automatic traffic signals. Accident reductions are only likely when specific problems are identified and then targetted by specific measures. The following measures are likely to reduce accidents: a) provision of facilities targetted to reduce right turn; and b) increasing the number of vehicle stages above two. Other measures are identified which are likely to either have no effect, or to actually increase the accident rate.

  • Corporate Authors:

    County Surveyors' Society, Essex County Council

    Globe House, New Street
    Chelmsford, Essex,   England 
  • Publication Date: 1989-6


  • English

Media Info

  • Pagination: n.p.
  • Serial:
    • Issue Number: 1/6

Subject/Index Terms

Filing Info

  • Accession Number: 00498365
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1990 12:00AM