Shrewsbury Railway Station - Signalling

Signalling

Severn Bridge Junction signal box, at the south end of the station and built by the LNWR, is the largest surviving mechanical signal box in the World, with a frame accommodating 180 levers, and is a listed building. Whilst the line beyond Abbey Foregate signal box to Wolverhampton has been updated to electronic signalling, Shrewsbury itself is set to remain lever operated for the foreseeable future. As a result of Shrewsbury's joint (GWR/LNWR) history, and having been transferred at different times between the Western and London Midland regions of BR and more recently Network Rail - it is now in the Great Western territory again - the signalling is a diverse mixture of lower-quadrant and upper-quadrant semaphore signals, with a few colour lights too. Crewe Junction, on the north end of the station, accommodates around 120 levers and is of the same design as Severn Bridge Junction.

The other Shrewsbury signal boxes are at Abbey Foregate (to a GWR design), controlling the eastern corner of the triangle, Sutton Bridge Junction where the Aberystwyth line diverges from the Hereford line, Crewe Bank (was to have been closed in April 2009, but now due to close in 2012) just beyond the station towards Crewe, and Harlescott Crossing, slightly further on towards Crewe.

In Autumn 2010 changes were made to allow Cambrian and Welsh Marches line trains to depart in a southerly direction from Platform 3 — an upper quadrant signal replaced the previous shunting disc and a facing point lock was added to the points. Though the track layout could already accommodate this, until the lock was added only non-passenger movements southbound from Platform 3 could be made.