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Enquête déplacements web - face-à-face : quelle comparabilité ?

Abstract : Web and face-to-face travel surveys: how comparable are they? - Response rates for household travel surveys are tending to fall, and it seems unlikely that this trend will be reversed in the future. In recent years, travel data collection methods have evolved in order to obtain reliable data that are sufficiently detailed to feed increasingly complex models, and in order to integrate new technologies into survey protocols (Internet, GPS...). Combining different media is an obvious low-cost way of improving data quality as it increases the overall response rate. But the question of the comparability of data over time and between different survey modes remains unresolved. This paper makes a comparative analysis between the travel behaviours of web-based survey respondents and respondents to a face-to-face interview. The data were obtained from the 2006 Lyon conurbation household travel survey. Our analysis shows that the Internet respondents travelled less than the face-to-face respondents (3.0 versus 3.63 daily trips), and that the differences between the two groups varied according to the travel mode and trip purpose. While part of this difference can be explained by socio-economic disparities (the Internet respondents had a specific profile) we cannot exclude the possibility of under-reporting due to the web medium.
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Caroline Bayart, Patrick Bonnel. Enquête déplacements web - face-à-face : quelle comparabilité ?. Les Cahiers scientifiques du transport , AFITL, 2010, pp. 141-167. ⟨halshs-00566236⟩

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