The traffic light is for mariners, not motorists. The lock gives access to the docks and the Gloucester Sharpness canal from the River Severn. It also links the docks to the rest of England's waterway system.
SO8218 : Gloucester docks dry dock Gloucester dry docks. Interesting tug that looks to have a wooden hull. Does anybody know more. The adjoining pumphouse contains a large centrifugal pump that usec to be steam driven.