Harsig's Signalling Page 
Harsig's Signalling Page 

Last updated on
17th September 2020



Harsig's Signalling Page

 Northern Line 

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

Northern Extensions   Northern Line Extensions 1939-1941
A set of diagrams showing the details of signalling on the Northern Line between Archway and High Barnet when LPTB services were extended over the former Northern Heights Line in 1939. 
Northern City   Northern City Line
A pair of diagrams showing the signalling on the Northern City Line (Finsbury Park to Moorgate), both before and after the construction of the Victoria Line.

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.

Harsig's Signalling Page