The Dock Railway is a railway company in Bigg City Port.
The company's name is seen on the side tanks of the on the goods engine, whom they own. They also own Puffa and a variety of rolling stock. Apart from locomotives and rolling stock, the Dock Railway also owns Frank and Eddie, a pair of twin car floats.
The railway seems to be based on the New York Dock Railway, which was located alongside the Hudson River in New York. This railway also owned car floats similar to Frank and Eddie, and provided the contracts for New York Central Tugboat 13.