Compared to the UK, not a lot of Irish lines have names. Example: the lines in Britain have many names, like the Tees Valley Line for the Bishop Auckland-Saltburn line, or the East Coast Main Line for the London-Edinburgh line. I could go on with examples, but the point is, the lines aren’t just the “A-B line” or whatever company built the railway (some are, but that’s besides the point); so, which Irish examples have names? All I can think of is:
Derry Road (Portadown-Derry)
Great Northern main line (Dublin-Belfast)
Meath Road (Dublin-Navan)
Western Railway Corridor (Limerick-Collooney)
Branches (Youghal, Kingscourt, Oldcastle, Fenit, Castleisland, Ardee, Foynes, Ballina, etc.)
Can anybody think of more?