M4 motorway - - M4
EXITS ref name exit_to 49 Pont Abraham 48 Hendy A4138 Llanelli 47 Penllergaer A483 Swansea West;A48 Gorseinon 45 Ynysforgan A4067 Pontardawe 45 Ynysforgan A4067 Swansea, Pontardawe 44 Lôn-las A48 Swansea East 44 Lôn-las A48 Swansea East 43 Llandarcy A465 Neath, Merthyr Tydfil 43 Llandarcy A465 Neath, Merthyr Tydfil 42 Earlswood A48 Briton Ferry;A483 Swansea 42 Earlswood A483 Swansea 41 Pentyla A48 Port Talbot 40 Taibach A4107 Port Talbot 38 Margam A48 Port Talbot 36 Sarn A4061 Bridgend;A4063 Maesteg 36 Sarn 35 Pen-coed A473 Pen-coed 33 Capel Llanilltern 33 Capel Llanilltern 32 Coryton 32 Coryton 30 Pentwyn Interchange A4232 Cardiff East 29 Castleton A48(M) Cardiff East & South 28 Tredegar Park A48 Newport;A467 Risca, Brynmawr 28 Tredegar Park A48 Newport;A467 Risca, Brynmawr 27 High Cross B4591 High Cross 26 Malpas Interchange A4051 Newport, Cwmbrân, Caerleon 26 Malpas Interchange 25A Grove Park 25 Caerleon Interchange B4596 Caerleon 24 Coldra A449 (M50) The Midlands, Monmouth;A48 Newport 24 Coldra A48 Newport;A449 Monmouth 23A Magor B4245 Magor 23A Magor B4245 Magor 23 Rogiet M48 Chepstow 22 Pilning Interchange 22 Pilning Interchange 21 Awkley Interchange M48 Chepstow 20 Almondsbury M5 The South West, Bristol West, Bristol Airport, The Midlands, Gloucester 20 Almondsbury M5 The South West, Bristol West, Bristol Airport, The Midlands, Gloucester 19 Hambrook 19 Hambrook 18 Tormarton Interchange A46 Bath, Stroud 18 Tormarton Interchange A46 Bath, Stroud 17 Stanton St Quintin A429 Cirencester;A350 Chippenham 15 Plough Hill Interchange A346 Marlborough;A419 Swindon 12 Theale Interchange 12 Theale Interchange 11 Three Mile Cross Interchange 11 Three Mile Cross Interchange 10 Winnersh Interchange 7 Huntercombe Spur 7 Huntercombe Spur 5 Langley Roundabout 5 Langley Roundabout 4B Thorney M25, (M1) Watford, (M40) Birmingham, Heathrow Airport T4, (M23) Gatwick Airport, (M3) Winchester 4B Thorney M25, Heathrow Airport T4, (M23) Gatwick Airport, (M40) Birmingham, (M1) Watford 4 Heathrow Interchange Uxbridge, Hayes,Heathrow Airport T123 4 Heathrow Interchange (A408) Uxbridge,Heathrow Airport T123 3 Cranford Parkway Interchange 1 Chiswick Roundabout
| EXITS | |||
|---|---|---|---|
| ref | name | exit_to | |
49 | Pont Abraham | ||
48 | Hendy | A4138 Llanelli | |
47 | Penllergaer | A483 Swansea West;A48 Gorseinon | |
45 | Ynysforgan | A4067 Pontardawe | |
45 | Ynysforgan | A4067 Swansea, Pontardawe | |
44 | Lôn-las | A48 Swansea East | |
44 | Lôn-las | A48 Swansea East | |
43 | Llandarcy | A465 Neath, Merthyr Tydfil | |
43 | Llandarcy | A465 Neath, Merthyr Tydfil | |
42 | Earlswood | A48 Briton Ferry;A483 Swansea | |
42 | Earlswood | A483 Swansea | |
41 | Pentyla | A48 Port Talbot | |
40 | Taibach | A4107 Port Talbot | |
38 | Margam | A48 Port Talbot | |
36 | Sarn | A4061 Bridgend;A4063 Maesteg | |
36 | Sarn | ||
35 | Pen-coed | A473 Pen-coed | |
33 | Capel Llanilltern | ||
33 | Capel Llanilltern | ||
32 | Coryton | ||
32 | Coryton | ||
30 | Pentwyn Interchange | A4232 Cardiff East | |
29 | Castleton | A48(M) Cardiff East & South | |
28 | Tredegar Park | A48 Newport;A467 Risca, Brynmawr | |
28 | Tredegar Park | A48 Newport;A467 Risca, Brynmawr | |
27 | High Cross | B4591 High Cross | |
26 | Malpas Interchange | A4051 Newport, Cwmbrân, Caerleon | |
26 | Malpas Interchange | ||
25A | Grove Park | ||
25 | Caerleon Interchange | B4596 Caerleon | |
24 | Coldra | A449 (M50) The Midlands, Monmouth;A48 Newport | |
24 | Coldra | A48 Newport;A449 Monmouth | |
23A | Magor | B4245 Magor | |
23A | Magor | B4245 Magor | |
23 | Rogiet | M48 Chepstow | |
22 | Pilning Interchange | ||
22 | Pilning Interchange | ||
21 | Awkley Interchange | M48 Chepstow | |
20 | Almondsbury | M5 The South West, Bristol West, Bristol Airport, The Midlands, Gloucester | |
20 | Almondsbury | M5 The South West, Bristol West, Bristol Airport, The Midlands, Gloucester | |
19 | Hambrook | ||
19 | Hambrook | ||
18 | Tormarton Interchange | A46 Bath, Stroud | |
18 | Tormarton Interchange | A46 Bath, Stroud | |
17 | Stanton St Quintin | A429 Cirencester;A350 Chippenham | |
15 | Plough Hill Interchange | A346 Marlborough;A419 Swindon | |
12 | Theale Interchange | ||
12 | Theale Interchange | ||
11 | Three Mile Cross Interchange | ||
11 | Three Mile Cross Interchange | ||
10 | Winnersh Interchange | ||
7 | Huntercombe Spur | ||
7 | Huntercombe Spur | ||
5 | Langley Roundabout | ||
5 | Langley Roundabout | ||
4B | Thorney | M25, (M1) Watford, (M40) Birmingham, Heathrow Airport T4, (M23) Gatwick Airport, (M3) Winchester | |
4B | Thorney | M25, Heathrow Airport T4, (M23) Gatwick Airport, (M40) Birmingham, (M1) Watford | |
4 | Heathrow Interchange | Uxbridge, Hayes,Heathrow Airport T123 | |
4 | Heathrow Interchange | (A408) Uxbridge,Heathrow Airport T123 | |
3 | Cranford Parkway Interchange | ||
1 | Chiswick Roundabout | ||