In this chapter we address the following question: Does the\ud direction and/or magnitude of the influence of urban form on travel vary across\ud different household types? If the answer is `yes', we can suggest the existence of\ud interaction effects in the impact of urban form. If, on the other hand, the analysis\ud shows no differences in the impact of urban form, this suggests that household types\ud display similar responses to urban form, irrespective of their personal situation. In\ud particular, we investigate differences in the effect of urban form, or residential\ud context, on trip frequency and travel time across six household types: single workers,\ud two- and one-worker couples, two- and one-worker families and senior households.\ud The analysis of travel time is segmented by trip purpose: we differentiate between\ud commuting times, `maintenance' times (e.g. trips running household errands, moving\ud goods, shopping, giving lifts to people etc.) and leisure travel times, for several\ud reasons. First, this broader perspective permits us to obtain better insights into the\ud impact of urban form on travel patterns than a focus on commuting alone. Second,\ud the number of both maintenance and leisure trips is larger than that ofcommuting\ud trips in the Netherlands (Schwanen et al., 2001a). The data used for this analysis is\ud derived from a nationally representative sample of the Dutch population, and stems\ud from the 2001 Netherlands National Travel Surve
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