Talks to avert a potential Bus Éireann strike will take place today at the Labour Relations Commission.
Kevin Foley, the LRC director of conciliation, has called in unions and management in an attempt to avert a strike which is due to take place from next Thursday.
Three unions have balloted for industrial action: Siptu, the Transport Salaried Staffs Association (TSSA) and the National Bus and Rail Union (NBRU).
Bus Éireann, which has 2,500 staff, plans to implement cuts in terms and conditions for staff from Sunday, without agreement from unions if necessary.
The threatened strike action is for an indefinite period and could severely curtail bus services.
Workers have rejected proposals to cut overtime and to increase the working week for clerical and executive staff.
There will also be cuts in annual leave entitlement and expenses.
Bus Éireann says the measures are necessary to stave off projected losses of €16 million this year.