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Compliance Testing for Locomotive LED Headlights and Auxiliary Lights, Phase III

Document Series
Technical Reports
Federal Railroad Administration
Report Number
Subject Rolling Stock
Locomotive headlights, auxiliary lights, LED, halogen, Phase III compliance testing, visibility aspects, subjective testing, Code of Federal Regulations §229.125

This report describes the compliance testing of light-emitting diode fixtures used as locomotive headlights and auxiliary lights. The purpose of Phase III testing was to study the ability of observers to identify inconspicuous visual targets along the track, the pattern formed by the locomotive lights, and the flashing light emitted from an end-of-train device. Observations were made from inside the locomotive cabin as well as on the track wayside and the tests conducted quantified the distance at which observers were able to identify the various visual targets presented.

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Last updated: Friday, April 9, 2021