Southend Pier Railway - a comprehensive history, which includes mention of the old and current signalling. The Swanage Railway provide illustrations and updates on the progress of their signal boxes at Harmans Cross and Swanage. The TGV Signalling System - describes the signalling in use in the Channel Tunnel. The Torre Signal Box Group - an informative site that includes a lot of general information too. Westinghouse Rail Systems have their own site.
All sites have descriptions in English unless otherwise stated.
Australia The Signalling Interest Group of Western Australia site presents history and photographs of signalling in Australia. Austria Smidi's Austro-Swiss Railway Site , by Roland Smiderkal, covers signalling and track layouts. Bavaria Feldbahn - Ralph Schreiner's pages on light railway signalling. Belgium Belgium Signalling Site , presented by Jeroen Winters, covers modern railway signalling. Dutch language only.