The government legislation that defines the R375, the Roads Act 1993 (Classification of Regional Roads) Order 2012 (Statutory Instrument 54 of 2012), provides the following official description:
Swinford — Kilkelly, County Mayo
Between its junction with R320 at Market Street Swinford and its junction with N17 at Liscosker via Davitt Place and Park Road at Swinford; Kilbride, Derryronun and Kilkelly all in the county of Mayo.[1]