The road measures 30.70 miles long and would take a car obeying speed limits 53 minutes to travel its length.
The B4518 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 LLANBRYNMAIR, Llan, Bont Dolgadfan, Pennant, Staylittle, Van, Elan Valley, RHAYADER, Cwmdauddwr, St. Harmon, Pant-y-Dwr, Tylwch, and LLANIDLOES.
The road is located entirely within Powys.