Public sector workers in Banbridge will be taking to the picket lines today (Friday) following a decision to take industrial action over service cuts.
There will be no Ulsterbus services on Friday except the express Belfast to Dublin service at 23:00 GMT and no trains, local or Enterprise, will run either.
The Department of Education has said it is the responsibility of school principals to decide if their school will remain open.
Members of the Irish National Teachers’ Organisation, which represents mainly Catholic teachers, is the only teaching union who voted for strike action.
As a result, Catholic schools are likely to be most affected.
The Department of Health have said arrangements have been put in place to ensure “critical services will be maintained”.
Cover will be provided for emergency services and activities.