Susilo, Y. and Avineri, E.
The impacts of household structure to the individual stochastic travel and out-of-home activity time budgets.
43rd Universities Transport Study Group Conference, Milton Keynes, UK, 5th-7th January 2011.
The amount of travel time made by households and individuals can be seen as a result of complex daily interactions between household members, influenced by opportunities and constraints which vary from day-to-day. Using Stochastic Frontier Model and dataset from the 2004 UK National Travel Survey, this study examines the unseen stochastic limit and the variations of the individual and
household travel time overtime. The results show that most of individuals may have not reach their limit yet to travel and may still be able to spend further time in travel activity. The model and distribution tests show that only full-time workers’ out-of-home time expenditure which is actually have reached it limit and the existence of dependent children will reduce the unseen constraints of their out-of-home time thus reduce their ability to engage further at out-of-home activities. Even after the out-of-home trips taken into account in the analysis, the model shows that the dependent children’s in-home responsibility will still reduce the unseen boundary of individual ability to travel and engage at out-of-home activities. The analysis also reveals that some groups of population (e.g. high income households, younger people etc.) have a larger needs of spending minimum travel time and also more bigger time constraints in doing their out-of-home travel and activities, whilst others (e.g. male full-time workers) need less travel time to satisfy their minimum travel needs. This study also suggests that the individual out-of-home time expenditure may be a better budget indicator in drawing the constraints in individual space-time prisms than individual time travel budget.
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