Glasgow Central Station - Signalling

Signalling

The original 1889 signal box was replaced with an electro-pneumatic power-operated box based on the Westinghouse system. Work started in October 1907 and it opened on 5 April 1908. It was built directly over the River Clyde, sitting between the two river bridges, above the level of the tracks. Inside was a frame of 374 miniature levers, making it the longest power frame ever built in Great Britain.

Glasgow Central Signalling Centre, located in the "vee" of Bridge Street Junction, opened on 2 January 1961. It replaced signal boxes at Central Station, Bridge Street Junction, Eglinton Street Junction and Eglinton Street Station. When initially opened it was capable of handling 1,000 routes.

The new signalling centre was needed for three reasons:

• The 1907 power signal box was worn out;
• The original 1879 bridge over the River Clyde was coming to the end of its useful life, and it was more effective to use the newer (1904) bridge to handle all the traffic, with the lines signalled bi-directionally;
• Electrification of the Cathcart Circle Lines, and subsequently the Gourock and Wemyss Bay services and the West Coast Main Line.

In addition to the removal of the east river bridge, the scissor crossovers through the station, the Cathcart Engine siding, East Bank Siding, Mid Bank Siding and No. 14 Dock were removed. The West Bank Siding was numbered as Platform 11a.

Glasgow Central Signalling Centre closed on 27 December 2008, when its area of control was transferred to the new West of Scotland Signalling Centre (WSSC) at Cowlairs. The NX panel is to be preserved. The station is currently signalled by two Westinghouse Westlock Interlockings which are controlled via a GE MCS control system.