Roman road from Neath - Nidum - (NPRN 301350) to Coelbren (NPRN 301348).
Two minor Roman military enclosures have been identified beside the road, at Hirfynydd (NPRN 93165) & Rheola Forest (NPRN 301353).
The route continues north past Coelbren towards Brecon Gaer (see NPRN 407112).
