B4301 (Pontarddulais - Ammanford)
|Length:||6.7 miles (10.8 km)|
|Now part of:||B4297, A483|
|Route outline (key)|
The direct road between Pontarddulais and Ammanford in east Carmarthenshire was originally given the number B4301. It was soon upgraded to A-road status as part of the A4138.