iStockPassengers on rush hour trains into Glasgow faced disruption after a “fault” with the signalling system at Queen Street.
ScotRail warned services running to and from the busy station would be cancelled, revised or delayed on Thursday morning.
A number of journeys from Edinburgh were halted – with services reduced to half hourly from Waverley.
Trains ran at reduced speeds after the fault was identified in the Cowlairs area affecting all trains coming in and out of the station.
In an update after 11am, ScotRail said disruption caused by the fault had ended.
Meanwhile passengers travelling to Glasgow Central via Paisley Gilmour Street faced similar disruption in the early hours of the morning due to a fault.
Services were cancelled and delayed at Gilmour Street before some lines reopened.
Journeys to Gourock and Wemyss Bay were affected.
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