| Przebieg trasy |
|
|
| ANGLIA, Wielki Londyn |
| A4 |
Central London |
 |
 |
(1) |
Central London, Hammersmith A4 |
 |
(2) |
Chiswick, Staines, Hounslow, North Circular Road, South Circular Road A4 A205 A315 A406 |
 |
|
MOP Heston |
 |
(3) |
Feltham, Hayes, Hounslow, Heathrow T4 & Cargo A312 |
 |
(4) |
Hayes, Uxbridge, Heathrow T1, T2 & T3 A4 A408 |
 |
(4b) |
Heathrow T4 & Cargo, Watford, Birmingham, Gatwick, Winchester M25 |
| Berkshire |
 |
(5) |
Langley, Staines, Eton A4 B470 |
 |
(6) |
Slough, Windsor A335 |
| Buckinghamshire |
 |
(7) |
Slough A4 |
 |
|
most nad Tamizą |
| Berkshire |
 |
(8/9) |
High Wycombe, Henley, Maidenhead A308(M) A404(M) |
 |
(10) |
Reading, Wokingham, Bracknell A329(M) |
 |
(11) |
Reading, Basingstoke A33 B3270 |
 |
|
MOP Reading |
 |
(12) |
Theale, Reading A4 |
 |
(13) |
Newbury, Oxford A34 |
 |
|
MOP Chieveley (dostęp z węzła) |
 |
 |
RAF Welford (kier. Londyn) |
 |
(14) |
Hungerford, Wantage A338 |
 |
|
MOP Membury |
| Wiltshire |
 |
(15) |
Malborough, Swindon, Oxford A346 A419 |
 |
(16) |
Swindon, Wootton Bassett, RAF Lyneham, Calne A3102 B4005 |
 |
(17) |
Cirencester, Chippenham A350 A429 B4122 |
 |
|
MOP Leigh Delamere |
| Gloucestershire |
 |
(18) |
Bath, Stroud A46 |
 |
(19) |
Bristol M32 |
 |
(20) |
The MIDLANDS, The SOUTH WEST, Gloucester, Bristol M5 |
 |
(21) |
Chepstow (kier. Swansea) M48 |
 |
(22) |
The SOUTH WEST, Avonmouth M49 |
 |
|
most Second Severn Crossing nad rzeką Severn (5128 m) |
| WALIA, Monmouthshire |
 |
|
PPO (kier. Swansea) |
 |
(23) |
Chepstow (kier. Londyn) M48 |
 |
(23a) |
Magor B4245 |
 |
|
MOP Magor (dostęp z węzła) |
 |
(24) |
The MIDLANDS, Monmouth, Newport A48 A449 B4237 |
 |
(25) |
Caerleon B4596 |
 |
(25a) |
Newport, Cwmbran A4042 |
 |
|
tunel Brynglas Tunnel (362 m) |
 |
(26) |
Cwmbran, Newport, Caerleon A4051 |
 |
(27) |
High Cross B4591 |
 |
(28) |
Cwmbran, Newport, Caerleon A48 A467 |
 |
(29) |
Cardiff (kier. Swansea) A48(M) |
| Glamorgan |
 |
(30) |
Cardiff A4232 |
 |
|
MOP Cardiff Gate (dostęp z węzła) |
 |
(32) |
Cardiff, Merthyr Tydfil A470 |
 |
(33) |
Cardiff, Cardiff Airport, Barry, Penarth A4232 |
 |
|
MOP Cardiff West (dostep z węzła) |
 |
(34) |
Llantrisant, Rhondda A4232 |
 |
(35) |
Bridgend, Pen-coed A473 |
 |
(36) |
Bridgend, Maesteg A4061 A4063 |
 |
|
MOP Sarn Park (dostęp z węzła) |
 |
(37) |
Pyle, Porthcawl A4229 |
 |
(38) |
Port Talbot (brak wjazdu w kier. Swansea) A48 |
 |
(39) |
Port Talbot (jedynie wjazd w kier. Swansea) A48 |
 |
(40) |
Port Talbot A4107 |
 |
(41) |
Port Talbot (półwęzeł) A48 B4286[1] |
 |
(41) |
Briton Ferry(półwęzeł) A48[2] |
 |
|
most nad rzeką Neath |
 |
(42) |
Swansea (półwęzeł) A483[1] |
 |
(42) |
Briton Ferry, Swansea (półwęzeł) A48 A483[1] |
 |
(43) |
Neath, Merthyr Tydfil A465 B4290 |
 |
(44) |
Swansea A48 A4230 B4291 |
 |
(45) |
Swansea, Pontardawe A4067 B4603 |
 |
(46) |
Llangyfelach, Felindre A48 B4489 |
 |
(47) |
Swansea A48 A483 |
 |
|
MOP Swansea (dostęp z węzła) |
 |
|
most nad rzeką Loughor |
| Carmarthenshire |
 |
(48) |
Pontarddulais, Llanelli A4138 |
 |
(49) |
rondo Llandeilo A48 A483 |
 |
|
MOP Pont Abraham (dostęp z ronda) |
 |
| A48 |
Carmarthen |