Queen Street signal box, opened in 1881, was on a gantry spanning the tracks close to the tunnel mouth.
It closed on 26 February 1967 when control of the high level station was transferred to a panel in Cowlairs signal box.
That box was superseded by the new Cowlairs signalling centre on 28 December 1998.
 This in turn was abolished in October 2013 and the station is now under the supervision of Edinburgh IECC (which will eventually become the Edinburgh Rail Operating Centre).

The low level station had two signal boxes, 'Queen Street West' and 'Queen Street East'.
Both boxes were over the tracks and closed on 8 February 1960.
The low level lines came under the control of Yoker Signalling Centre (IECC) on 19 November 1989.
Queen Street signal box, opened in 1881, was on a gantry spanning the tracks close to the tunnel mouth. It closed on 26 February 1967 when control of the high level station was transferred to a panel in Cowlairs signal box. That box was superseded by the new Cowlairs signalling centre on 28 December 1998.  This in turn was abolished in October 2013 and the station is now under the supervision of Edinburgh IECC (which will eventually become the Edinburgh Rail Operating Centre).
The low level station had two signal boxes, 'Queen Street West' and 'Queen Street East'. Both boxes were over the tracks and closed on 8 February 1960. The low level lines came under the control of Yoker Signalling Centre (IECC) on 19 November 1989.
Glasgow Queen Street railway station