USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

eLibrary

Frequently Asked Questions on LERB / OCRB

This document is meant only as an aid in understanding the initial stage of FRA’s dispute resolution process, i.e., the Locomotive Engineer Review Board. For complete information as to the regulatory requirements, please refer to 49 CFR Part 240.

Ground Penetrating Radar for Railroad Track Substructure Evaluation

This report presents the results of the first three phases of a multiphase project to adapt Ground Penetrating Radar (GPR) to railroads for use in developing useful indices of substructure condition and performance. Included are brief discussions of some basic GPR principles, as well as data...