Yes there are still some U28B's in service on the TTI, I know for a fact that they have 2 or 3 active still. They have quite a few that are stored dead and partially parted out at their shop in Paris,KY. The other TTI units are U36B's. U28B's and U36B's are the only locomotive models owned by TTI. Made a trip over that way earlier this year, was well worth it.
Bryan Jones