The road measures 14.58 miles long and would take a car obeying speed limits 23 minutes to travel its length.
The B4576 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 Bwlchllan, Penuwch, Bethania, Bontnewydd, Trefenter, Llangwyryfon, and Llanfarian.
The road is located entirely within Dyfed.