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Compliance Testing for Locomotive LED Headlights and Auxiliary Lights, Phase III
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...
Bond-Slip Relationships of Wires Used in Pretensioned Concrete Railroad Ties
KSU developed special wire testing frames and procedures to measure bond-slip performance of prestressing wires (or strands) in concrete. The test called for applying tension to the wires prior to casting the concrete and then slowly releasing the prestress force into the concrete. Forces and...
Prestressing Steel and Concrete Variables Affecting Transfer Length in Pretensioned Concrete Crossties
This report highlights advances in understanding the prestressing steel and concrete properties that affect the transfer length (TL) in pretensioned concrete crossties. Transfer length values in pretensioned concrete ties are highly dependent on the type of wire indentation pattern used and the...
Fiscal Year 2020 Enforcement Report
FRA takes care to ensure the accuracy and completeness of all data in each annual enforcement report. Information in each of FRA’s annual enforcement reports is based on information that FRA had at the time that the agency issued the report. If FRA receives more...