@article{ref1,
title="Track loading fundamentals--7 various speed effect formula",
journal="Railway gazette",
year="1957",
author="Clarke, C. W.",
volume="106",
number="",
pages="479-481",
abstract="This document discusses some formulae which are used to determine the permitted rail speed. Included are AAR, Indian Railways and Petersen formulae. The author suggests that rail speed is &quot;a computed value, deduced by the elastic theory of the primary flexural stress at the base of the rail not exceeding the allowable stress value for the rail steel.&quot; The resultant value also includes an allowance for impact or speed effect.<p />",
language="",
issn="",
doi="",
url="http://dx.doi.org/"
}