Workers at Bus Éireann will go on all out strike from midnight.
Trade unions met earlier and decided to strike, saying cost cutting measures by the company have created extreme anger among staff.
A letter from the company this week said job losses would be a part of the overall survival plan for the company.
Dermot O’Leary from the NBRU says they’ll be on the picket lines from midnight – and the strike could go on for a while.
Meanwhile Bus Éireann says it’s extremely disappointed at the announcement of strike action.
In a statement it says it’ll cause major inconvenience to our customers and exacerbate the perilous financial situation at the company.
It says losses for January and February are 41 percent higher than the same period last year.
It also claims that unions were only offering to give up 500 thousand euro on a current overtime bill of 13 million.