This article assesses the implications for the road transport industry of the recent discovery that many British roads will be regularly congested in the future. This was recently revealed for the first time in the 'stress' maps of Britain's motorways and trunk roads, published by the Department of Transport (DoT). The DoT defines 'stress' as the predicted traffic flow expressed as a percentage of the Congestion Reference Flow (CRF). The maps are coloured according to the following code: (1) green for flows up to 80% of CRF, meaning generally satisfactory operation, with occasional peak period congestion; (2) orange for flows from 80% to 100% of CRF, meaning regular congestion on about half the days in a year; and (3) red for flows above 100% of CRF, meaning regular congestion during peaks and in some hours outside them. The maps basically indicate how congestion will increase with time, especially around conurbations, assuming correct traffic forecasts. The proportion of red roads increases steadily from 1995 through 2005 to 2015, but the DoT points out that there is a +/- 15% margin of error. Statistics indicate that British roads are among the most heavily congested in Europe, with 67 vehicles/km. Probably, their traffic congestion will be addressed by a combination of pricing and technical measures.

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    Reed Business Information, Limited

    Quadrant House, The Quadrant
    Brighton Road
    Sutton, Surrey  United Kingdom  SM2 5AS
  • Authors:
  • Publication Date: 1996-5-16


  • English

Media Info

  • Features: References;
  • Pagination: p. 22-3
  • Serial:
    • Publisher: Reed Business Information, Limited
    • ISSN: 0027-206X

Subject/Index Terms

Filing Info

  • Accession Number: 00726546
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Oct 28 1996 12:00AM