Another freight ferry will be added to the services between Rosslare Europort and France from 1 April.
DFDS, who introduced a new Rosslare-Dunkirk route on 2 January and has seen a high level of bookings for its ships from truck drivers and transport companies, will be introducing a fourth ferry to the route.
The Ark Dania will have a capacity of 188 units, made up of 12 driver-accompanied trucks and 176 trailers.
The addition will mean Rosslare has 36 ferry sailings in total to the continent every week from April.
According to DFDS, the direct service between the Co Wexford port and Dunkirk has proved popular as it allows drivers and businesses to avoid checks and paperwork on the UK landbridge.
"Ark Dania will be the flagship of our route and very manoeuvrable," route director Aidan Coffey said, "with the capabilities of carrying diverse cargo. It will also free up capacity on our three other ferries for more driver accompanied trucks".
Mr Coffey said there is "a huge demand" from all sectors of industry who want to use the direct route, "as more and more realise the benefits of using the direct route compared to the UK the land-bridge".
General manager of Rosslare Europort Glenn Carr said the additional capacity and frequency on the route "further demonstrates the commitment of Rosslare Europort and DFDS to meet industry demand and ensure the continuity of Ireland's supply chain post Brexit".
He said that, as further border control procedures are implemented by the UK government in the coming weeks, additional direct services from Rosslare Europort to avoid the landbridge are timely.
Rosslare now has direct services to Dunkirk, Cherbourg, and San Malo/Roscoff in France, as well as Bilbao in Spain.