Hey Anne,

This was a temporary start/end-ramp for the motorway when it was under construction. It was constructed in segments, which are still tagged as such, i.e. to/from
https://www.openstreetmap.org/node/1907545966
(Cashel - Cullahill -- Cullahill - Portlaoise);
https://en.wikipedia.org/wiki/R639_road_(Ireland)#20th_and_21st_centuries

This changeset has been reverted by
https://www.openstreetmap.org/changeset/148740347

Your changes
https://www.openstreetmap.org/way/1257998131

Regards,

Daniel