“…Concepts such as New Urbanism (in the USA) and the Compact City (in Europe) aim to reduce car use and travel distances by creating neighborhoods with a high density, a high diversity and a design oriented toward public transit and non-motorized travel (Cervero, 1996;Friedman et al, 1994;Schwanen and Mokhtarian, 2005a). The popularity of these concepts resulted in numerous empirical studies investigating the influence of the built environment on travel behavior, thereby statistically controlling for differences in socio-economic factors such as income, car ownership and household composition (Bagley and Mokhtarian, 2002;Chen et al, 2008;Mokhtarian and Cao, 2008;Van Acker et al, 2011a;van Wee et al, 2002). However, more recent research has shown that within homogeneous socio-economic groups different travel behavior can still be observed, indicating that not only 'objective' (or hard) variables, like the built environment and socio-economic factors, influence travel behavior, but that 'Subjective' (or soft) variables should also be included in the analysis (Mokhtarian and Cao, 2008;Van Acker et al, 2011b;van Wee et al, 2002).…”