Workers at Irish Rail have announced plans for five 24-hour strikes as part of a pay dispute with the company.
It follows a meeting on Friday afternoon.
The trade union group representing all workers at Irish Rail have decided to serve notice on the company for the following series of industrial actions:
Wednesday November 1st 24 hour Work Stoppage full withdrawal of labour and the placing of pickets
Tuesday November 7th 24 hour Work Stoppage full withdrawal of labour and the placing of pickets
Tuesday November 14th 24 hour Work Stoppage full withdrawal of labour and the placing of pickets
Thursday November 23rd 24 hour Work Stoppage full withdrawal of labour and the placing of pickets
Friday December 8th 24 hour Work Stoppage full withdrawal of labour and the placing of pickets
The November 14th strike date will clash with the Ireland v Denmark World Cup play-off at Lansdowne Road.
It comes after union members at Irish Rail voted 'overwhelmingly' in favour of industrial action.
SIPTU members voted by 84% in favour of action amid the ongoing pay dispute at the transport company, while NBRU members backed industrial action by 93%.
The ballot counts come only hours after talks broke down at the Workplace Relations Commission (WRC) overnight.
Tens of thousands of commuters are facing disruption.
Management say they offered a 1.75% pay rise, based on new productivity measures.
However, unions rejected the deal, with Irish Rail workers saying they still have not been offered a 'no-strings' attached deal.
Iarnród Éireann said it regrets the decision.
The company has reiterated that talks at the WRC arose from a Labour Court recommendation - which stated that if at the end of the WRC process there were outstanding issues of difference, they should be referred back to the Labour Court for a final recommendation.
Irish Rail says it "remains committed" to this process.
SIPTU TEAC division organiser, Greg Ennis, said: "While the impending industrial action is regrettable and will no doubt affect the travelling public, our members believe they are left with no option but to pursue such a course on foot of the procrastination by management over what is a reasonable pay claim and which is in line with similar pay awards within the CIE group and wider transport sector".