The road measures 7.64 miles long and would take a car obeying speed limits 15 minutes to travel its length.
The B4254 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 TREHARRIS, Edwardsville, Trelewis, Nelson, Gelligaer, Penpedairheol, Glan Y Nant, BLACKWOOD, Fleur De Lis, Fairview, Woodfieldside, and Pontllanfraith.
The road connects Mid Glamorgan and Gwent.