Network Rail will complete vital infrastructure improvement work at locations across Scotland over the festive period.
The £15m investment will help to keep Scotland’s Railway reliable for passengers and freight services.
Most of the track, drainage and signalling work will take place over the Christmas and New Year holidays when the majority of trains do not run.
Some projects will disrupt services, including on the Helensburgh & West Highland Line.
Signalling upgrades taking place at Craigendoran near Helensburgh over the New Year will see services to Helensburgh Central start/stop at Dumbarton Central on January 2 while services from Fort William, Mallaig and Oban will terminate at Crianlarich, with rail replacement buses in operation between Crianlarich and Glasgow Queen Street. Caledonian Sleeper services on the West Highland Line will not run.
Gerry McQuade, capital delivery director for Network Rail Scotland, said: “Our work over the festive period is designed to protect the railway infrastructure and improve passengers’ experience when travelling by train.
“We are pleased to be able to deliver most of this work without any impact on services as it’s being carried out when trains are not running. We are, however, urging passengers to check their journey in advance.”
David Simpson, ScotRail service delivery director, said: “We will be doing everything we can to keep people. Customers can find out more about our alternative travel plans and what it means for their own journey by visiting the ScotRail website or by downloading our free mobile app.”