AUTOMATIC SPEED SIGNS - AN EVALUATION

Details are given of an experiment carried out in March-May, 1976, on the A286, in Fernhurst, Sussex, in which drivers' attention was drawn to the fact that they were exceeding the 30 mph speed limit but without an obvious risk of prosecution. The sign with the legend: "police. You are speeding", was triggered by vehicles passing over inductive loops; temporary loops were stuck to the road surface 80 yards in advance of the sign, and a permanent automatic data collection site was located 150 yards beyond the sign. Speed data were collected for 5 time periods during each day. Graphs show the percentage of vehicles exceeding 35 mph for both permanent and temporary sites, and a comparison is made between the average percentage of vehicles exceeding 35 mph before and after the installation of the sign. Results of the experiment showed that: (1) the sign was effective 24 hours a day; (2) once installed, it made a minimum demand on operational traffic resources; (3) it does not involve any additional police administrative effort. Costs are quoted. /TRRL/

  • Availability:
  • Corporate Authors:

    Home Office, Police Research Service Branch

    Horseferry House, Deanryle Street
    London SW1,   England 
  • Authors:
    • Eagle, R
    • Homans, B D
  • Publication Date: 1976

Media Info

  • Features: Figures; Photos; Tables;
  • Pagination: p. 9-13
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00152573
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jun 17 1977 12:00AM