The road measures 5.64 miles long and would take a car obeying speed limits 9 minutes to travel its length.
The B4398 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 Newbridge, Wern, Carreghofa, LLANYMYNECH, Maesbrook, and Knockin.
The road connects Powys and Shropshire.