Piccadilly Line 

A selection of diagrams showing the signalling arrangements for sections of the Piccadilly Line at different times throughout its history.

A diagram showing details of the signalling along the Uxbridge Branch of the Metropolitan Line in 1948. It also shows the Piccadilly Line between South Harrow and Uxbridge, including the connections to Harrow Gas Works.

Most of the diagrams are in PDF format and to open them you will need Adobe Acrobat Reader. If you do not already have this it can be downloaded from the Adobe Website.