Under a contract with the Federal Railroad Administration (FRA), the University of Florida (UF) instrumented a section of the Virginia Avenue Tunnel in Washington, DC. The tunnel, built between May 2015 and June 2018, was designed and built with pads...

This report presents a non-contact ultrasonic technique to map the full-field surface deflection of railroad ties using known concepts of sonar-based distance measurements. Between September 2019 and July 2021, the University of California San Diego (...