The road measures 16.18 miles long and would take a car obeying speed limits 25 minutes to travel its length.
The B4594 is a B Road and is located in the Zone 4 Highways Region.
This is a true long-distance route, journeying through numerous towns like Erwood, Llandeilo Graban, Painscastle, Rhosgoch, Dolycannau, Newchurch, Gladestry, Walton, Old Radnor, Burlingjobb, and Stanner.
The road is located entirely within Powys.