This document provides supplementary information to accompany the previously published Federal Railroad Administration (FRA) report titled Reducing Hazards Associated with Visual and Automation-Aided Track Inspections, Report No. DOT/FRA/ORD-21/18....

From 2017–2019, the Federal Railroad Administration sponsored VORtech and its project partners to develop advanced physics-based modeling of wheel-rail friction. Sub-models were established for the elastic and plastic shearing of third body layers,...

This report presents the means to identify and assess impacts and mitigation methods for aerodynamic effects of high-speed trains on high-speed rail corridors for designers, operators, and other affected parties.  It provides descriptions of...