The article questions the current methods used by the UK Department of the Environment in the evaluation of trunk road schemes. The author criticises the methods used to forecast car ownership and suggests that in the national traffic forecasts, car use might be better forecast as a function of household characteristics and stage in family life cycle rather than of individual car ownership and use. The method of estimating time values is considered over simplistic for there is increasing empirical evidence suggesting thresholds or other types of non-linearity. The coba method of evaluating urban by-pass schemes is also criticised for ignoring environmental benefits and judging schemes only in terms of benefit to traffic. /TRRL/

  • Availability:
  • Corporate Authors:

    London School of Economics and Political Science

    Houghton Street, Aldwych
    London WC2A 2AE,   England 
  • Authors:
    • Heggie, I G
  • Publication Date: 1979-1

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00301898
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Dec 19 1979 12:00AM