Dudley Tunnel is a canal tunnel on the Dudley Canal Line No 1, England. At about 3,172 yards (2,900.5 m) long, it is now the second longest canal tunnel on the UK canal network today. (Standedge Tunnel is the longest, at 5,456 yards (4,989.0 m), and the 3,931 yards (3,594.5 m) Higham and Strood tunnel is now rail only).