Luas strikes are to go ahead this weekend - as Dublin prepares to celebrate the centenary of the Easter rising.
Drivers have overwhelmingly rejected a pay deal of up to 18.7 per cent over 33 months.
The action means there'll be no trams running on Easter Sunday or Monday when major events are planned in the capital.
SIPTU says there's been a complete breakdown in trust between the drivers and management.
While Transdev has expressed its shock and says the decision has serious implications for the company.