This article discusses the Urban Speed Survey, a 40-week study to monitor congestion in British urban areas commissioned by the Department of the Environment, Transport and the Regions (DETR). Transport engineers Thorburn Colquhoun will conduct the study, which covers main roads with a daily flow of over 10,000 vehicles in urban areas with populations over 200,000. The sample includes five randomly selected towns with populations between 100,000 and 200,000; here, a lower traffic threshold has been permitted. The survey is designed to give a total picture of average speeds on each urban area's road network, as a measure of mobility and an indication of congestion levels. Thorburn Colquhoun records its data in an in-car laptop computer, using its own specially designed software Ariel II (Advanced Road Information Event Logger), which records distances at two-second intervals, and Mapinfo, which records distance and time data on specific road sections. The data are transmitted to the Highways Agency (HA) for analysis. The article gives details of the data acquisition process, which is especially laborious. Thorburn Colquhoun must spend 40 weeks mapping out routes and physically driving along each of them. It is vital that their in-car observers and computer operators have full concentration.

  • Availability:
  • Corporate Authors:

    Hemming Group, Limited

    32 Vauxhall Bridge Road
    London,   United Kingdom  SW1V 2SS
  • Authors:
    • FORNI, J
  • Publication Date: 2000-2-10


  • English

Media Info

  • Features: References;
  • Pagination: p. 12-3
  • Serial:
    • Volume: 187
    • Issue Number: 5568
    • Publisher: Hemming Group, Limited
    • ISSN: 0039-6303

Subject/Index Terms

Filing Info

  • Accession Number: 00790469
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Apr 11 2000 12:00AM