Foliage Season. Railroad Museum of New England's 2203 U23B (ex Providence and Worcester Railroad 2203, née Conrail 2798) was the assigned power on Saturday, October 22, 2011, seen crossing the Naugatuck River in Thomaston, Connecticut. The RMNE's Pumpkin Patch and Autumn Colors Limited Trains now include a 1st Class Lounge and rotating motive power from the railroad's roster to view the bountiful New England colors.