Stated choice valuation of urban traffic air pollution and noise

In this study environmental problems related to urban traffic are valued by Stated Choice. Stated Choice is a Stated Preference method in which non-ma rket goods are assessed relatively to each other and not in absolute amount s as with the more common Contingent Valuation Method. The use of Stated Ch oice to estimate people's willingness to pay to reduce environmental proble ms caused by road traffic can be seen as an extension of the established us e of Stated Choice in transport research. Despite the fact that the results from this study have been used by the Norwegian Public Roads Administratio n in their cost benefit analyses since 1995, this paper points to the fact that considerable uncertainty remains with regard to (1) the area of validi ty of the results, (2) the impact on the valuations of interaction effects and other general methodological problems with Stated Preference methods, a nd (3) problems related to the complex choice situation of Stated Choice, ( C) 1998 Elsevier Science Ltd. All rights reserved.