The issue within the Muirhouse area will affect all routes to the south of Glasgow, Barrhead, Kilmarnock and Carlisle.

No services are able to run on routes between Glasgow Central and Carlisle, Kilmarnock, Barrhead, Newton, Neilston and East Kilbride.
(Permalink) Glasgow and Kilmarnock Joint Glasgow and South Western Main Line Muirhouse Signalling fault