@article{ref1,
title="The Optimal Duration for a Travel Survey: Empirical Observations",
journal="IATSS research",
year="2009",
author="Senbil, M and Kitamura, Ryuichi",
volume="33",
number="2",
pages="54-61",
abstract="Empirical observations were carried out using a 6-week travel survey, Mobidrive, to probe into the optimal duration problem of a single wave travel survey. The regressions on certain travel elements (i.e., number of daily trips, VKM per day, number of home based trip chains, daily travel time expenditure) suggest that a 2-week survey duration might serve well to represent personal variability in various dimensions. However further analysis conducted by using nonparametric survival analysis points to a longer period as the elapsed time between activity participation does not seem to converge to true values, at least for rare activities such as recreation.<p />",
language="",
issn="0386-1112",
doi="",
url="http://dx.doi.org/"
}