The road measures 21.11 miles long and would take a car obeying speed limits 34 minutes to travel its length.
The A4059 is a A Road and is located in the Zone 4 Highways Region.
This is a true long-distance route, journeying through numerous towns like Penderyn, Hirwaun, Penywaun, ABERDARE, Llwydcoed, Aberaman, Cwmbach, MOUNTAIN ASH, Penrhiwceiber, Ynysboeth, and Abercynon.
The road connects Powys and Mid Glamorgan.