The changing allocation of activities in space and time by the use of ICT--"Fragmentation" as a new concept and empirical results

Barbara Lenz and Claudia Nobis

Transportation Research Part A: Policy and Practice, 2007, vol. 41, issue 2, 190-204

Abstract: Theoretical and empirical research about the impact of information and communication technologies (ICT) on transport relies on the hypothesis that ICT use leads to a reorganization of activities in time and space thus having as a consequence impacts on travel behavior. The breaking up of activities into discrete pieces by the use of ICT is the starting point of the fragmentation concept that underlies the present article. The concept argues that transport demand increases by the fragmentation of activities and explores the relevant mechanisms for this process. In all, however, the concept is still rather vague. Therefore, the authors discuss some elements of the concept on a theoretical level, in particular the question why individuals "fragment" their activities. In the empirical section they use a data set about activities, ICT use and travel behavior in Germany to find out how far an activity like work, which is particularly apt for fragmentation, shows signs of temporal and spatial disintegration. With the help of a cluster analysis they identify groups with different "fragmentation behavior" and investigate if a statistically significant relation exists between fragmentation behavior and ICT use. Accordingly, the focus of the article lies on the impact of ICT use on the performance of activities by different behavioral groups. The link to travel behavior is made by examining mode choices for different purposes and travel related attitudes.

Date: 2007
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