DART drivers who are members of SIPTU have voted unanimously in favour of strike action in the event of Iarnród Éireann proceeding with an attempt to introduce rosters for a ten minute service as planned on Sunday 10 April.
SIPTU Organiser Paul Cullen said: "Our members see the introduction of a ten minute DART service as an issue which should be an integral part of discussions on increasing productivity.
"The failure of the company to effectively engage in such productivity discussions resulted in industrial action by all train drivers in Irish Rail during October and November 2015."
He added: "Our members are deeply disappointed that the management of Irish Rail seems intent on provoking further conflict with workers," Mr Cullen said.
"This is despite the Labour Court proposing a negotiation process which aims to create a forum where solutions can be found to productivity issues at the company.
"Introducing these rosters in April, as management is threatening, would be seen by our members as a deeply unfortunate and provocative move," he added.
Iarnród Éireann said the ten minute DART timetable is not a productivity issue as extra drivers have been trained, so the new timetable can be delivered within existing rostering parameters.
A spokesperson said the increase in frequency was badly needed, and should be delivered for passengers on on schedule.
He said the company had already confirmed that it would be attending conciliation on the ten minute DART plans at the Workplace Relations Commission.