They are taking there time, normally they hide a replacement barrier on site
DART Delays - Merrion Level Crossing by Corporate Communications
19th January 2007 - UPDATE 11.25hrs
DART services remain delayed due to a truck damaging barriers at Merrion Level Crossing. Repair works are underway, including replacement of a barrier which was torn off by the truck involved in the incident.
Delays are expected to be up to 30 minutes.
Iarnród Éireann apologises for the inconvenience caused.