South Wales Trunk Road Agent

Our Roads

The South Wales Trunk Road Agent Network

The South Wales Trunk Road network consists of approximately 436km of trunk roads and 178km of motorways.

The SWTRA area includes almost all of the 14 administrative districts of the Local Authorities between Fishguard and the Second Severn Crossing.

Here is a map of the motorways and trunk roads for which SWTRA is responsible. All other roads are managed by the Unitary Authorities in the area.

Click on the map to report a problem

Routes in the SWTRA area
Road No Route Extent
M 48 Severn Bridge - M4, Junction 23 Plaza.
M 4 Second Severn Crossing - Pont Abraham.
A 48M M4, Junction. 29 - A48 Western Avenue.
A 40 England Border at Monmouth - Fishguard.
A 4042 M4, Junction 25A - A40 Hardwick Roundabout, Abergavenny.
A 4060 A470, Junction at Pentre-bach - A465, Dowlais Junction.
A 4076 Milford - A40, Haverfordwest.
A 4232 M4, Junction 33, Capel Llanilltern - Culverhouse Cross Interchange.
A 449 M4, Junction 24, Coldra - A40, Raglan Interchange.
A 465 Llangua - M4, Junction 43, Llandarcy.
A 466 Newhouse Roundabout - A48( T ) Highbeech Roundabout.
A 470 M4, Cyffordd 32, Coryton – A465, Cefn Coed.
A 477 A40 Junction, St Clears - Pembroke Dock.
A 48 Chepstow - Carmarthen.
A 483 Pont Abraham - A40, Rhosmaen.
A 487 A40, Fishguard - Stand Back Lane.