On the afternoon of June 30h, 2025, the Metro North/ Department of Transportation Geometry Train, with CTDOT/CTrail Brookville BL20GHM 125 leading, crosses the Naugatuck River Bridge on the Waterbury Branch in Derby, Connecticut. The train traversed all of Metro-North's mainline track while the Federal Railroad Administration’s (FRA) former Metroliner, DOTX 216 inspection car, collected geometry data for the FRA and the U.S. Department of Transportation.