@article{ref1,
title="A theory of traffic flow for evaluation of geometric aspects of highways",
journal="Highway Research Board bulletin",
year="1962",
author="Harr, Milton E. and Leonards, Gerald A.",
volume="308",
number="",
pages="87-91",
abstract="An analytic approach is developed whereby the various aspects of a highway (such as curves, grades, lane width, traffic control devices, type and condition of surfacing) can be evaluated quantitatively under varying traffic density and weather conditions providing a rational basis for geometric design. In the present analysis it is postulated that traffic reacts to a motivating pressure potential in a pattern that determines the behavior of any particular vehicle traversing a given section of roadway. This concept can be expressed quantitatively in a manner analogous to that used in describing one-dimensional viscous flow in a compressible fluid. Solution of the resulting differential equation yields a parameter which is a numerical measure of the salient characteristics of a road. Procedures are then proposed to determine this parameter, using measurable vehicular velocities, which eliminate the need for evaluating the motivating pressure potential.<p />",
language="",
issn="0073-2206",
doi="",
url="http://dx.doi.org/"
}