Iarnród Éireann has advised customers of delays to Dart and Commuter services as a result of a bridge strike and a passenger falling ill on Tuesday.
It said services have since resumed following both incidents with delays of up to 15 minutes.
Earlier on Tuesday, the company said in a tweet that commuters could expect delays of 20 minutes after a truck hit the rail bridge at Amiens Street in Dublin, affecting the line between Tara Street and Connolly Station.
Southbound Dart services were later suspended through Tara Street due to a customer requiring medical attention.
Separately, Iarnród Éireann warned passengers on the 6.45am Belfast to Connolly service of a 30 minute delay due to leaf fall on the tracks.
Elsewhere, AA Roadwatch and gardaí have said the full stretch of the R128 Skerries/Rush Road is closed following a car crash overnight.