Commuters have been warned to expect some "knock on" delays this afternoon following "signalling issues".
The issues arose this morning between Mossley West and Antrim.
The signalling fault caused a barrier to come down in the Templepatrick area, resulting in road traffic delays.
An Translink Railways spokesperson said: "Signalling issues have now been resolved, some knock-on delay and disruption may be experienced for a time."
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