Translink has advised passengers and parents to make alternative transport arrangements for next week, ahead of strike action.
Strikes will continue for the full week from Monday April 25, ending on Sunday, May 1, and will include Glider services.
The industrial action means commuters will have no Ulsterbus or Metro services for the full week.
Read more: Translink bus strikes set to go ahead from Monday, April 25
A statement on Wednesday from Translink read: "We continue to work with the unions to try to resolve this unprecedented strike action and its potential impact on essential bus services, affecting local school children and the wider community.
"While we continue to discuss the issues with our unions, we would advise passengers to start making alternative travel arrangements for next week including parents and carers of children that normally travel on any Translink bus service to and from school.
"We will continue to try to avert this action and have ongoing talks with the Trade Unions.
"We will keep passengers advised as the situation develops."
Davy Thompson from Unite the Union said that there had been "no further request for a meeting from the company, so the planned strike action will go ahead".
Read more: Mum says son's Belfast school that goes 'above and beyond' gives 'hope'
Read more: Northern Ireland schools and other public services facing strike disruption after Easter
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