The road measures 13.14 miles long and would take a car obeying speed limits 23 minutes to travel its length.
The B4459 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 PENCADER, Llanfihangel-Ar-Arth, Capel Dewi, Rhydowen, Pontsian, and Talgarreg.
The road is located entirely within Dyfed.