Over 50 incidents on Irish railways, including a collision between and train and truck in Co Mayo, were examined by inspectors from the Railway Accident Investigation Unit last year.
The unit's annual report shows a total of 52 preliminary examinations of serious accidents and other incidents on the rail network were carried out last year - 12 more than the previous year.
A full investigation was carried out into an incident at Cartron level crossing in Mayo which occurred just over a year ago.
At 8.47am on 17th August last, a Mayo County Council truck drove through the level crossing, as the Ballina to Dublin goods train was approaching - the train collided with the truck, and the council truck was thrown clear of the train and into an adjacent ditch.
Both the truck and train driver were taken to Mayo University Hospital for treatment following the collision.
The annual report shows that, of the 14 collisions recorded last year, five involved Luas trams.