The Listowel town counciller has a farm on the route, quelle surprise.
The North Kerry was never sold off in the same (hurried) fashion as the West Cork, it's still owned by CIE to this day, likewise W.ford-Ballinacourty/New Ross.
There is a walkway/cycleway (the Great Southern Trail) developed from Ardagh through to Newcastle West and currently ends around Abbeyfeale, walked a bit of it recently around NCW, quite well done and a great leisure/tourism asset. The only major structures on the route are a large steel bridge outside NCW (a team from Irish Rail did some repairs on it a few years ago) and Barnagh tunnel.