Trains across Scotland are operating as normal amid a system fault affecting other services across the UK.
Network Rail is experiencing a nationwide fault with the radio system between driver and signallers, leading to delays and cancellations to services.
ScotRail said information displayed on the website and app are updated by a UK-wide system which may lead to incorrect information being displayed.
Passengers are advised to check individual routes before travelling.
Services at Central Station and Queen Street station in Glasgow are running normally with no delays or cancellations currently shown on departure boards.
Commuter services between Glasgow and Edinburgh are operating as normal with no queues.
ScotRail spokesperson Paul McKay said: "Our colleagues are Network Rail are experiencing an industry-wide problem with communications systems, you should contact them if you have any questions on the fault.
"ScotRail services are operating well, with some minor delays in places.
"We're asking customer to check before they travel. The fault does not affect the safe running of trains."
Network Rail delays were caused by a failure of the onboard GSM-R communication system.
GSM-R is designed to enable driver and signallers to communicate digitally with signalling centres.
The failure is currently being investigated by the operator.