Comment: Prior to the Normandy landings, the US Army used CCKWs converted into rail cars on railway branch lines to warehouses filled with equipment throughout Great Britain. These vehicles were converted in situ by the US Ordnance Corps, and helped overcome the shortage of steam locomotives.
The conversion involved chassis reinforcement by means of two steel girders, the installation of buffers in front and behind, ballast to improve track holding and traction power, an access ladder to the driving cab, and railway wheels. These machines could move four to five small box cars.
Less elaborate models were used for inspection and maintenance of railway lines.