2014•Transport Research Arena (TRA) 5th Conference: Transport Solutions from Research to DeploymentEuropean CommissionConference of European Directors of Roads (CEDR)European Road Transport Research Advisory Council (ERTRAC)WATERBORNEᵀᴾEuropean Rail Research Advisory Council (ERRAC)Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)Ministère de l'Écologie, du Développement Durable et de l'ÉnergieRequires access
Testing regularity in the allocated time to travel
Iragaël Joly
Open publisher page 0 citations
Abstract
Development of the activity-based approach leads us to consider travel time as a derived demand from the participation in (out-of-home) activities. The literature on travel times has proposed several llawsr, as several ways to resume the complex relationships between activity and travel time. The paper proposes a discussion and empirical tests of these laws (stability, proportional assignment, travel time ratio). Our sample is constituted of household mobility surveys of seven cities (Swiss and French), each observed at least at two different dates (between 1990 and 2006). Consequently, we search for distinct or transferable relationships between activities duration and the corresponding travel time (measured at the daily and the trip levels). Results show that daily activity times impact significantly daily travel time. Travel time associated with an activity is not a fixed part of the activity duration (work, leisure or shopping activities). Finally, strong regularities appear when estimating the relation between travel time and activities in terms of elasticities. Marginal propensity to accept higher travel time duration is decreasing with higher activity duration.