Transport Minister Eamon Ryan says the need for additional services is being examined, following the withdrawal of the Aircoach Galway-Dublin service.
The service - the 706/706X - will stop operating next month because it's proven to not be commercially viable.
Raising the matter in the Dáil, Sinn Fein Deputy Mairead Farrell said it'll have a serious impact on rural connectivity along the route.
She said it was meant to fill a gap left by the termination of the Bus Eireann 20X20 service - but this latest failure highlights the folly of relying on private operators to fulfill public services.
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Speaking in response, Minister Ryan said the matter is being looked at.
