|From:||Furnace, Llanelli (SN503012)|
|Distance:||9 miles (14.5 km)|
|Meets:||B4309, B4317, A484|
|Route outline (key)|
The B4308 is a largely rural road in southern Carmarthenshire.
The route starts at a mini-roundabout on the B4309 in the Furnace area of Llanelli and heads west, soon leaving town. It skirts Stradey Wood before climbing through another wood, eventually reaching Pen-y-Mynydd, on the Mynydd Pen-bre ridge at an altitude of 175 m. The road then descends steeply to Trimsaran. Here the B4317 joins from the right at a mini-roundabout and is subsumed by the B4308 for the next mile before turning off again to the left.
The B4308, now almost at sea level, crosses the Gwendraeth Fawr next to the ancient Pont Spwdwr, then, climbing slowly out of the valley, crosses the line of a disused railway before continuing west to intersect the A484 Kidwelly bypass at a staggered crossroads, the main road here being in a shallow cutting.
Our road continues into town – with inbound traffic following Alstred Street while outbound traffic uses the parallel Lady Street – to meet the pre-bypass route of the A484 (running from Pontyrhyd roundabout in the south to Parc-y-Bocs roundabout in the north), now also a part of the B4308, though not signed as such.