THE USE OF CONTINGENT RANKING FOR VARIATIONS IN AIR QUALITY VALUATION DUE TO TRANSPORTATION PROJECTS

Changes in air quality are not always taken into account when undertaking a cost-benefit analysis of a transportation scheme. Even more rarely, an ad hoc study is completed for on-site valuation of changes in air quality due to the effects of a new infrastructure. In countries where standard values are not available to be somehow transferred to the particular case-study, the benefits in air quality are just excluded from the evaluation. The consequences of failing to value such effects are even more dramatic when the infrastructure is an urban highway with an important impact on the overall fuel consumption. Spain, as many other countries, qualifies for all of the above. However, as this paper shows, a recent cost-benefit study of a major tolled urban motorway - called "Tuners de Vallvidrera" - in Barcelona has involved an ad hoc evaluation of the improvement in air quality. The method used to elicit the money value has not been the standard Contingent Valuation or an indirect technique, due to all their limitations, but the more advanced Contingency Ranking Method, which is far more reasonable for respondents and minimises the risk of strategic behaviour, which is the most serious potential bias. This method is starting to gain supporters in the environmental economics field and has a great deal of possible uses for transportation, as this first application shows. The econometric model applied is a Multinomial Ordered Probit Model corrected with weights. Results obtained and presented by this paper are most sound and they directly fit into the cost-benefit analysis. For the covering abstract, see IRRD 898930.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 465-80
  • Serial:
    • Volume: P413

Subject/Index Terms

Filing Info

  • Accession Number: 00752417
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-86050-303-8
  • Files: ITRD
  • Created Date: Sep 18 1998 12:00AM