eLibrary Search
The FRA eLibrary contains all the documents that are found throughout the FRA Public Website. Multiple pages on the website may link to the same eLibrary item based on its set of metatdata.
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Technical Reports
Inductive Interference in Rapid Transit Signaling Systems, Volume I: Theory and Background
Keywords: Automatic Train Control Systems, Chopper-Controlled Propulsion Systems, Audio-Frequency Signaling Systems
Abstract: This report analyzes the problem of inductive interference with audio-frequency signaling caused by chopper-controlled propulsion systems on rapid transit vehicles. After...
Technical Reports
Ultrasonic Inspection of Railroad Rails by Electromagnetic Acoustic Transducers (EMATs)
Keywords: Defects, Laboratory Testing, Nondestructive Inspection, Field Testing, Shear-Horizontal Waves, Shear-Radial Waves
Abstract: EMATs offer unique characteristics that appear to be advantageous for inspection of railroad rails. These characteristics include the features that EMATs do not require a liquid...
Technical Reports
Effects of Rail Profile Variation
Keywords: Heumann Wheel Profile, Rail Corrugation, Rail Grinding, Rail Wear, Rail Wheel Radius
Abstract: Railroads in various countries including the United States have found that benefits may be obtained by grinding rails to an 'asymmetric' profile rather than to the original 'new'...
Technical Reports
Laboratory and Field Testing of NYCTA Power Frequency Track Circuits
Keywords: AC Propulsion Control Systems; Electromagnetic Interference; Power Frequency Signaling System
Abstract: This report addresses the possible electromagnetic interference between the electronic AC propulsion control systems and the signaling and train control systems. The potential...
Technical Reports
Structure and Properties of Thermite Welds in Premium Rails
Keywords: Mechanical Properties, Residual Stresses
Abstract: Thermite welds were used to join combinations of premium rails and AREA Controlled Cooled Carbon rails (i.e., standard rails). The premium rails comprised head-hardened rails and...