The A4214 is a short route forming the western and southeastern sides of an inner ring road around Llanelli town centre.
The road starts at a junction with the A484 on Hall Street, from where it runs southwesterly as a D2 before curving to the left and narrowing to become the northern end of Station Road. At a signal-controlled crossroads, we turn left, leaving Station Road to carry on towards the SSE as a branch of the B4304. We are now on Murray Street, which we follow in a northeasterly direction before running slap-bang into the goods entrance of a large Asda store – obliging the A4214 to turn right at a small roundabout, the first of a set of four which will take it around three sides of the St Elli Shopping Centre car park. Back on our previous alignment, it is now but a 250-metre run along Stepney Place before we meet the A484 again – at a roundabout near College Square.
The Murray Street/Stepney Place section of the A4214 was originally numbered B4305, although the road originally ran straight before Asda was built on top of it. Church Street used to be unclassified - the B4304's old route was along the now-pedestrianised Stepney Street.