Abstract
Stated Preference surveys are frequently adopted for the analysis of the impact of transport policies on travel demand However, evidence suggests that preferences derived from SP surveys are contingent on context. In this study we suggest that stated intention, i. e. a prediction of self-behavior in future in SP surveys, can be applied to travel demand analysis based on attitude theory. The theory explains why intention sometimes deviates from actual behavior. In an empirical demonstration using panel data obtained from commuters (n=903) before and after the opening of a new subway line, support is obtained for several conjectures about why behavioral intentions are, or are not, implemented.
