High Quality Content by WIKIPEDIA articles! Birkenhead Dock Branch is a disused railway line running from the South junction of Rock Ferry, to the site of the former Bidston Dock on the Wirral Peninsula, England. The branch is approximately 4.5 miles (7.2 km) in length and is accessible by rail from Bidston East junction and from Rock Ferry railway station. The former Mollington Street Depot was joined to the branch line. Part of the branch runs through Haymarket Tunnel and a low-level cutting. The cutting is situated in the centre of Birkenhead, visible from the road flyovers which are in the town centre. The disused Canning Street North signal box and level crossing are also situated on the branch. Level crossings are also situated across Duke Street and Wallasey Bridge Road.