There were delays today on both the 7.35am Heuston to Westport service and the 9.45am Westport to Hesuton service.
This was as a result of a motorist driving through a barrier on the Castlerea to Ballyhaunis line.
No one was injured in the incident.
However, there was significant delay as repairs had to be carried out to the barrier.
Full service has since resumed.