Bus Éireann and Local Link say they'll be operating at reduced capacity under the Level Four Covid restrictions.
Bus Éireann says capacity on its services in Cavan, Monaghan and Donegal will be reduced to just 25 per cent when Level Four restrictions come into place.
The company says under the Government plan that's the maximum capacity it's allowed to carry.
Under Level Four travel should be limited within your own county and should only be for essential reasons.
Bus Éireann says its local and Expressway services will be limited to a capacity of 1 in 4 seats which should be reserved for essential workers.
All Local Link services in Cavan and Monaghan will also be operating at reduced capacity.
Bus Éireann routes affected include:
30/X30 Dublin to Donegal
32 Dublin-Letterkenny
495 Ballyshannon-Kinlough-Manorhamilton
66 Galway-Longford-Cavan-Monaghan
162 Clones-Monaghan-Dundalk
175 Monaghan-Cootehill-Cavan
175A Cavan to Monaghan
182 Monaghan-Ardee-Collon-Drogheda
108 Kells-Baileboro
109 Dublin-Dunshaughlin-Navan-Kells-Cavan
109x Dublin-Kells-Cavan
111a Cavan-Granard-Kells
166 Dundalk-Carrickmacross-Cavan
465 Carrigallen-Kileshandra-Cavan
