Iarnród Éireann have issued a warning to people cutting across the rail lines and using them as shortcuts.
They've revealed train drivers had 32 “category 1” near misses in 2016 with trespassers, which required drivers to hit the brakes to avoid hitting a person.
They've also released footage of examples of people cutting across the tracks, including an incident at Kilbarrack which saw one person narrowly avoid being hit by a train from Dublin to Belfast that was travelling at 140km/h.
Go to 0:54 in the video above to see the incident in question.
A spokesperson for Iarnród Éireann said "any one of these trespass incidents at Kilbarrack, or any one of the 32 'category 1' near misses around the network could have resulted in a tragic and needless death or catastrophic injuries.
"A parent carrying a stroller who falls and hurts themselves or their child leaves the driver of the train in an impossible situation – trains take considerable distances to come to a halt even at moderate speeds, and a train cannot swerve around a stricken trespasser
"This is more than just a warning to young people, and to their parents to ensure they know of the risks, though this is of course critically important. The footage from Kilbarrack – where we have installed platform end barriers to counteract the problem – shows trespassers are adults and children, and adults must show example and responsibility also."