M4 motorway - - M4
EXITS ref name exit_to 1 Chiswick Roundabout A406 North Circular;A205 South Circular;A315 Chiswick 4 Heathrow Interchange Uxbridge, Hayes,Heathrow Airport T123 4 Heathrow Interchange (A408) Uxbridge,Heathrow Airport T123 3 Cranford Parkway Interchange 4B Thorney Interchange M25, Heathrow Airport T4, (M23) Gatwick Airport, (M40) Birmingham, (M1) Watford 4B Thorney Interchange M25, (M1) Watford, (M40) Birmingham, Heathrow Airport T4, (M23) Gatwick Airport, (M3) Winchester 5 Langley Roundabout 5 Langley Roundabout 7 Huntercombe Spur 10 Winnersh Interchange 11 Three Mile Cross Interchange 11 Three Mile Cross Interchange 12 Theale Interchange 12 Theale Interchange 15 Plough Hill Interchange A346 Marlborough;A419 Swindon 17 Stanton St Quinton A429 Cirencester;A350 Chippenham 18 Tormarton Interchange A46 Bath, Stroud 18 Tormarton Interchange A46 Bath, Stroud 19 Hambrook 19 Hambrook 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 21 Awkley Interchange M48 Chepstow 22 Pilning Interchange 22 Pilning Interchange 23 Rogiet M48 Chepstow 23A Magor B4245 Magor 23A Magor B4245 Magor 24 Coldra A48 Newport;A449 Monmouth 24 Coldra A449 (M50) The Midlands, Monmouth;A48 Newport 25 Caerleon Interchange B4596 Caerleon 25A Grove Park 26 Malpas Interchange 26 Malpas Interchange A4051 Newport, Cwmbrân, Caerleon 27 High Cross B4591 High Cross 28 Tredegar Park A48 Newport;A467 Risca, Brynmawr 28 Tredegar Park A48 Newport;A467 Risca, Brynmawr 29 Castleton A48(M) Cardiff East & South 30 Pentwyn Interchange A4232 Cardiff East 32 Coryton 32 Coryton 33 Capel Llanilltern 33 Capel Llanilltern 35 Pen-coed A473 Pen-coed 36 Sarn 36 Sarn A4061 Bridgend;A4063 Maesteg 38 Margam A48 Port Talbot 40 Taibach A4107 Port Talbot 41 Pentyla A48 Port Talbot 42 Earlswood A483 Swansea 42 Earlswood A48 Briton Ferry;A483 Swansea 43 Llandarcy A465 Neath, Merthyr Tydfil 43 Llandarcy A465 Neath, Merthyr Tydfil 44 Lôn-las A48 Swansea East 44 Lôn-las A48 Swansea East 45 Ynysforgan A4067 Swansea, Pontardawe 45 Ynysforgan A4067 Pontardawe 47 Penllergaer A483 Swansea West;A48 Gorseinon 48 Hendy A4138 Llanelli 49 Pont Abraham
| EXITS | |||
|---|---|---|---|
| ref | name | exit_to | |
1 | Chiswick Roundabout | A406 North Circular;A205 South Circular;A315 Chiswick | |
4 | Heathrow Interchange | Uxbridge, Hayes,Heathrow Airport T123 | |
4 | Heathrow Interchange | (A408) Uxbridge,Heathrow Airport T123 | |
3 | Cranford Parkway Interchange | ||
4B | Thorney Interchange | M25, Heathrow Airport T4, (M23) Gatwick Airport, (M40) Birmingham, (M1) Watford | |
4B | Thorney Interchange | M25, (M1) Watford, (M40) Birmingham, Heathrow Airport T4, (M23) Gatwick Airport, (M3) Winchester | |
5 | Langley Roundabout | ||
5 | Langley Roundabout | ||
7 | Huntercombe Spur | ||
10 | Winnersh Interchange | ||
11 | Three Mile Cross Interchange | ||
11 | Three Mile Cross Interchange | ||
12 | Theale Interchange | ||
12 | Theale Interchange | ||
15 | Plough Hill Interchange | A346 Marlborough;A419 Swindon | |
17 | Stanton St Quinton | A429 Cirencester;A350 Chippenham | |
18 | Tormarton Interchange | A46 Bath, Stroud | |
18 | Tormarton Interchange | A46 Bath, Stroud | |
19 | Hambrook | ||
19 | Hambrook | ||
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 | |
21 | Awkley Interchange | M48 Chepstow | |
22 | Pilning Interchange | ||
22 | Pilning Interchange | ||
23 | Rogiet | M48 Chepstow | |
23A | Magor | B4245 Magor | |
23A | Magor | B4245 Magor | |
24 | Coldra | A48 Newport;A449 Monmouth | |
24 | Coldra | A449 (M50) The Midlands, Monmouth;A48 Newport | |
25 | Caerleon Interchange | B4596 Caerleon | |
25A | Grove Park | ||
26 | Malpas Interchange | ||
26 | Malpas Interchange | A4051 Newport, Cwmbrân, Caerleon | |
27 | High Cross | B4591 High Cross | |
28 | Tredegar Park | A48 Newport;A467 Risca, Brynmawr | |
28 | Tredegar Park | A48 Newport;A467 Risca, Brynmawr | |
29 | Castleton | A48(M) Cardiff East & South | |
30 | Pentwyn Interchange | A4232 Cardiff East | |
32 | Coryton | ||
32 | Coryton | ||
33 | Capel Llanilltern | ||
33 | Capel Llanilltern | ||
35 | Pen-coed | A473 Pen-coed | |
36 | Sarn | ||
36 | Sarn | A4061 Bridgend;A4063 Maesteg | |
38 | Margam | A48 Port Talbot | |
40 | Taibach | A4107 Port Talbot | |
41 | Pentyla | A48 Port Talbot | |
42 | Earlswood | A483 Swansea | |
42 | Earlswood | A48 Briton Ferry;A483 Swansea | |
43 | Llandarcy | A465 Neath, Merthyr Tydfil | |
43 | Llandarcy | A465 Neath, Merthyr Tydfil | |
44 | Lôn-las | A48 Swansea East | |
44 | Lôn-las | A48 Swansea East | |
45 | Ynysforgan | A4067 Swansea, Pontardawe | |
45 | Ynysforgan | A4067 Pontardawe | |
47 | Penllergaer | A483 Swansea West;A48 Gorseinon | |
48 | Hendy | A4138 Llanelli | |
49 | Pont Abraham | ||