@article{ref1,
title="Variations in travel between individuals living in areas of different population density",
journal="Proceedings of the International Research Council on the Biomechanics of Injury conference",
year="1975",
author="Goodwin, P.b.",
volume="3",
number="",
pages="256-370",
abstract="Analysis of data from the National Travel Survey 1972-3 indicates that as population density increases, (a) the total number of stages per person remains constant; (b) the average stage distance is less; (c) travel is slower; (d) the use of private transport decreases the effects combine in such a way that; (e) the average time taken per stage for each mode separately and in total is approximately constant; (f) the total amount of time spent on all travel per person is approximately constant. A mathematical model based on fairly simple economic principles is discussed, and although this is not yet fully compatible with the empirical findings, it seems to offer a possibly useful approach.<p />",
language="en",
issn="2235-3151",
doi="",
url="http://dx.doi.org/"
}