It comes after Liveline received calls from people complaining about the journey.
Bus Éireann is investigating reports alleging one of its vehicles skipped a red light and collided with a parked Dublin Bus.
In a statement to JOE, it said it regrets the "negative experience and inconvenience reported by passengers" on the service between Ratoath in Meath and Dublin on Tuesday (16 November).
The statement from Bus Éireann comes after a passenger told
Liveline of his experience on the double-decker bus, which host Joe Duffy described as a "horror story".
The passenger alleged that the male driver of the bus took a wrong turn and broke a red light before knocking the wing mirror off of a parked Dublin Bus.
https://twitter.com/rteliveline/status/1460983728637976582
Meanwhile, another caller contacted Liveline to say that her daughter was on the bus.
She alleged her daughter approached the bus driver to ask if he knew he was going the wrong way and if he was feeling unwell and that the driver seemed to be "a little bit kind of dazed".
The full statement from Bus Éireann reads: "Bus Éireann is fully investigating incidents on a service between Ratoath and Dublin on Tuesday, 16 November, 2021.
"We very much regret the negative experience and inconvenience reported by passengers."
