Understanding travelers' daily travel-activity pattern formation is an important issue for activity-based travel demand analysis. The activity pattern formation concerns not only complex interrelations between household members and individual's socio-demographic characteristics but also urban...

A la suite des travaux entrepris en 1979 par Y.Zahavi, économiste à la Banque Mondiale, et à la lumière des enquêtes menées en milieu urbain au cours des trente dernières années, le travail de l'équipe a consisté à interroger et vérifier la constance du Budget-Temps-Transport (BTT),...

Escaping unidimensional analysis limits and linear regression irrelevancy, the duration model incorporates impacts of covariates on the duration variable and permits to test the dependence of daily travel times on elapsed time. In the perspective of a discussion of Zahavi's hypothesis, the...

The paper is concerned with the travel activity and more specifically the urban travel time during a day. This individual mean travel time budget (TTB) has been hypothesised by Zahavi (1980) to be a constant amount of time close to 1 hour per day. This TTB seems to be stable between different...

Cet article combine les méthodologies quantitatives et qualitatives pour l'étude des motivations conduisant certains individus à consacrer des temps importants à leur mobilité.Tout d'abord, une analyse quantitative des budgets-temps de transport (BTT) dans sept villes (Berne, Genève,...

This paper combines both quantitative and qualitative methods to provide supplemental information and results that clarify the reasons that individuals devote ample time to travel.Through a quantitative analysis of travel-time budgets (TTB) in seven cities (Zurich, Bern, Geneva, Rennes, Lyon,...

L'article s'appuie sur la base de l'UITP, « The millenium Cities Database » afin d'explorer les rapports espace-temps de la mobilité des villes du monde. L'étude des budgets temps de transport qu'il présente teste la validité de l'hypothèse de Zahavi. En renseignant les trois aspects de...

The paper exams the relationships between travel and activity times, in 7 travel surveys from 4 French and 3 Swiss cities, observed at two different periods. First, we test proportional assignment of total daily available time to activities (including transport). Second, proportionality is...

Dans le cadre du premier rapport de recherche, le travail de Zahavi est étudié afin d'énoncer clairement la conjecture de Zahavi et de comprendre les objectifs de son travail. Dans un second temps, le rapport tente de construire un premier cadre de réflexion sur la signification et les...

The relationship between travel time budget (TTB) and speed is central to transport economics and allows us to analyze travel behaviour, urban structure and the transport system. Together, this relationship and Zahavi's hypothesis provide a straightforward mechanism that explains the increase in...