SIPTU and Unite members at Bus Éireann have voted to accept Labour Court recommendations which include 200 job losses, pay cuts and freezes on increments.
The ballot comes after an all-out strike was suspended a month ago. The result of a similar ballot of NBRU members will be known next Friday.
SIPTU workers, with a turnout of 87%, voted 53.4% to 46.6% to accept the deal.
The Unite union, which represents about 70 craft workers, accepted the deal by a margin of 2:1.
Bus Éireann's board has also now accepted the proposals.
The company's transport services were at a standstill for 21 days from 24 March in response to management plans to implement cuts it said were essential to save the company.
After the failure of talks at the Workplace Relations Commission, both sides were called in by the Labour Court, which issued a 17-page recommendation.
This proposed voluntary redundancies for 120 drivers, 48 clerical workers and 22 from executive and management.
There are also pay cuts for anyone on over €60,000 along with cuts in overtime.
The company told the Labour Court that it was insolvent and the threat of examinership hung over the business.
It is now preparing what it is calling a "viability plan" for the end of the month.
SIPTU workers at Dublin Bus, Iarnród Éireann and school bus drivers have voted in the past few weeks to support the industrial action at Bus Éireann.
In a statement, Unite's Willie Quigley said the focus must now be on "mapping a sustainable road forward for Ireland's public transport system in general and Bus Éireann in particular".
He called on the Government to state when "the proposal for a stakeholder forum - which was endorsed in the Labour Court recommendation - will be implemented".
SIPTU's Willie Noone said that the acceptance of the recommendation was a "purely pragmatic decision as its contents will have huge cultural, structural and financial implications for all staff within the company and indeed the wider CIÉ Group".
He added that more talks with the company will be needed regarding the implementation of the recommendation, particularly over driver rosters and the time frames and selection processes around the voluntary redundancy scheme.