In the article the authors criticise the method of cost benefit analysis, known as COBA 8, used by the Department of Transport to evaluate the economics of new road proposals. Although accepted as one of the world's most advanced such systems, the way in which it is applied can lead to errors in the assessed economic performance of proposed roads. The source of error is stated to be caused by guidelines issued to users of the program stating that national average statistics must be used as input to COBA 8 in four areas - speed of vehicles on roads being superseded; assessment of annual vehicle flows; rate of growth of traffic; and, proportion of vehicles "in the work mode" - in place of actual or locally measured inputs. (TRRL)

  • Availability:
  • Corporate Authors:

    City Press Limited

    Fairfax House
    Colchester, Essex CO1 1RJ,   England 
  • Authors:
    • Cook, J R
    • Hotz, J
  • Publication Date: 1980-7-8

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00324967
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: May 21 1981 12:00AM