overgang in/uit Londen
Autosnelweg
1 Central London, Hammersmith
2 Chiswick , Staines , Hounslow , North Circular Road
Heston
3 Feltham , Hayes, Hounslow, Heathrow T4 & Cargo
4 Hayes, Uxbridge , Heathrow T1, 2 & 3
4B Heathrow T4 & Cargo, Watford , Birmingham Gatwick , Winchester (
5 Langley , Staines, Eton B470
6 Slough , Windsor
7 Slough
Theems
8/9 High Wycombe , Henley , Maidenhead A30(M) A404(M)
10 Reading , Wokingham , Bracknell A329(M)
11 Reading, Basingstoke B3270
Reading
12 Theale , Reading
13 Newbury , Oxford
Chieveley (naast de voormalige afrit)
14 Hungerford, Wantage
Membury
15 Marlborough , Swindon , Oxford
16 Swindon, Royal Wootton Bassett , RAF Lyneham ,B4005
17 Cirencester , Chippenham B4122
Leigh Delamere
18 Bath , Stroud
19 Bristol
20 The MIDLANDS , The SOUTH WEST ,Gloucester , Bristol
21 Chepstow
22 The SOUTH WEST, Avonmouth
Second Severn Crossing (Severn ) 5.128 m
tolpoort (alleen richtung Swansea)
23 Chepstow
23A Magor B4245
Magor (neben der Anschlussstelle)
24 The MIDLANDS, Monmouth ,Newport B4237
25 Caerleon B4596
25A Newport, Cwmbran
Brynglas Tunnel 362 m
26 Cwmbran, Newport, Caerleon
27 High Cross B4591
28 Cwmbran, Newport, Caerleon
29 Cardiff A48(M)
30 Cardiff
Cardiff Gate (naast de afrit)
32 Cardiff, Merthyr Tydfil
33 Cardiff, Cardiff Airport , Barry, Penarth
Cardiff West (naast de afrit)
34 Llantrisant, Rhondda
35 Bridgend , Pen-coed
36 Bridgend, Maesteg
Sarn Park (naast de afrit)
37 Pyle, Porthcawl
38 Port Talbot (geen afrit Ri. London)
39 Port Talbot (afrit Ri. London)
40 Port Talbot
41 Port Talbot B4286
41 Briton Ferry
42 Swansea
42 Briton Ferry, Swansea
43 Neath, Merthyr Tydfil B4290
44 Swansea B4291
45 Swansea, Pontardawe B4603
46 Llangyfelach, Felindre B4489
47 Swansea
Swansea (naast de afrit)
48 Pontarddulais, Llanelli
49 Llandeilo
Pont Abraham naast de rotonde)
Autosnelwegeinde
verder als Carmarthen
_map.svg)
De Second Severn Crossing, de brug over de Severn
M4 bij Bristol
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