Before and after surveys are a common method of measuring the effect of specific policies and projects designed to cause changes in travel behaviour. The purpose of this paper is to consider some issues involved in the design of before and after surveys required for the evaluation of projects designed to change travel behaviour. Specific comments are made on the inter-temporal coefficient of variation of various measures of travel (trips, kilometres, minutes) as a car driver and a public transport user over different periods of time by different travel units (persons and households). This analysis is based on data from the MobiDrive 6-week travel survey in Germany, and adapted to the Melbourne situation. The paper concludes with implications for sample design and sample size for projects such as the TravelSMART travel behaviour change program in Victoria. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E210413.
Samenvatting