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|---|---|
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| Route information | |
| Length | 4.97 mi (8.00 km) |
| Major junctions | |
| East end |  A48 at Pontarddulais |
 M4 | |
| West end |  A484 at Parc Trostre |
| Location | |
| Country | United Kingdom |
| Primary destinations | Llanelli |
| Road network | |
The A4138 is a main road in Carmarthenshire, Wales, connecting Pontarddulais with Llanelli. Running in a northeast to southwest direction, the road connects with M4 junction 48.[1] Northeast of the motorway, the road is classified as a non-primary route, while southwest of the motorway, the road is classified as a primary route. In both instances, the road is operated by Carmarthenshire County Council.
- ^ Ordnance Survey. "1:50,000 Landranger Map". Retrieved 13 April 2012.