This song I don’t think is traditional because it sounds post WW2, but I’ll post it in case it can be identified as such by anyone: http://lowrentmedia.nfshost.com/rails1.mp3
Definitely Americana, which is, indeed, heavily influenced by Celto-British, especially Scots-Irish. But while the first could be mistaken for an O’Carolan waltz-time, they’re not Irish Trad.