Last year was good for rail safety despite the Luas crash in O'Connell Street and the collapse of the Malahide railway viaduct, according to a report.
The Railway Safety Commission said it is actively working with Iarnród Éireann and Luas operator Veolia to make sure there is no repeat of those two incidents.
The Commission said Luas trams were involved in 23% less vehicle accidents and 10% less pedestrian accidents last year compared to 2008.
Iarnród Éireann did not have any passenger fatalities or serious injuries but three trespassers and one construction worker were killed.
The report found there was a moderate increase in broken rails and signals passed at danger but fewer collisions and derailments.
The number of bridge strikes, 114, was the same as in 2008.