@article{ref1,
title="The speed triangle: momentum, energy and PCM data",
journal="Collision: the international compendium for crash research",
year="2011",
author="Greear, Charlie and Thornburg, David and DeChant, Lee",
volume="6",
number="1",
pages="40-48",
abstract="Close-range photogrammetry (CRP) techniques can be used to derive three-dimensional measurements from photos taken at a crash scene. This case study highlights how CRP was used to help determine the root cause of a fatal street race, in which two cars were racing and a third car was hit, resulting in a fatality. A digital camera and photogrammetry software was used to map the crash scene, which extended over 403 feet. Only 40 minutes were needed to process the scene using photogrammetry, with another 3 hours of office work to fully map and diagram the scene. In addition to mapping the crash scene, CRP also allowed for the three-dimensional measurement of the vehicle profiles. This data provided the needed distances to complete the so-called &quot;speed triangle&quot; (momentum, energy and the powertrain control module) for accurate accident reconstruction.<p />",
language="",
issn="1934-8681",
doi="",
url="http://dx.doi.org/"
}