Home > M4 motorway

The M4 motorway is a motorway in the UK, which links London and Wales via Bristol

1 Westbound

• The M4 starts six miles west of central London where the A4 merges into the M4 on a raised flyover. (The A4 continues in its own right below the flyover.)
• Junction 1 (restricted access): A205 South Circular, A406 North Circular, A315 Chiswick, A4.
• Junction 2: A4 Staines, Hounslow.
• Heston services.
• Junction 3: A312 Heathrow Airport Terminal 4 and cargo, HayesHayes is the popular name for Hayes Communications (named after Dennis Hayes, founder), creator of the original self-dialing "smart" modem. It is also often used as a short form when referring to the Hayes command set (named after the company), originally, HarrowAlternative meanings: Harrow, London, a place in the London Borough of Harrow; Harrow School, a famous public school in the United Kingdom; The Harrow, a fantasy and horror magazine. In agriculture, a harrow is an implement for cultivating the surface of, FelthamFeltham is a place in the London Borough of Hounslow in London, England. Nearest places: Hanworth Heathrow Hampton Twickenham Heston Nearest railway station: Feltham railway station Middlesex..
• Junction 4: M4 spur Heathrow Airport terminals 1, 2 & 3, A408 UxbridgeUxbridge is the name of many places, including: Uxbridge, London, England Uxbridge, Massachusetts, USA Uxbridge, Ontario, Canada.. Access via spur to Junction 4a and A4 east and west.
• Junction 4b: M25The M25 motorway is one of the UK's motorways. It is the orbital motorway which encircles London. It is approximately 117 miles (188 km) in circumference. The motorway is mostly three-laned although there are a few short stretches which are two-laned and Heathrow Airport Terminal 4 and cargo, Gatwick Airport, Watford, Oxford.
• Junction 5: A4 Colnbrook, Langley, B470 Datchet.
• Junction 6: A355 Slough central, A332 Windsor.
• Junction 7: A4 Slough west.
• Junction 8/9: A404(M) High Wycombe, Henley, A308M Maidenhead.
• Junction 10: A329(M) Reading east, Wokingham, Bracknell.
• Junction 11: A33 Basingstoke, Reading central and south.
• Reading services.
• Junction 12: A4 Theale, Reading west.
• Junction 13: A34 Newbury, Oxford, Chieveley services.
• Junction 14: A338 Hungerford, Wantage.
• Membury services.
• Junction 15: A346 Marlborough, A419 Swindon, Gloucester.
• Junction 16: A3102 Swindon west, Wootton Bassett, Calne.
• Junction 17: A350 Chippenham, A429 Cirencester.
• Leigh Delamere services.
• Junction 18: A46 Bath, Stroud.
• Junction 19: M32 Bristol.
• Junction 20: M5 The south west, Bristol west, The midlands, Gloucester.
• Junction 21: M48 Chepstow This is the old M4
• Junction 22: M49 Avonmouth.
• Second Severn Crossing (bridge).
• Junction 23: No exit
• Junction 23a: Magor services. B4245 Magor, Caldicot.
• Junction 24: A48/B4237 Newport east, A449 Monmouth.
• Junction 25: B4596 Caerleon.
• Junction 25a: A4042 Newport, Cwmbran.
• Junction 26: A4051 Newport.
• Junction 27: B4591 High Cross.
• Junction 28: A48 Newport, A467 Risca, Brynmawr.
• Junction 29: A48(M) Cardiff east and south.
• Junction 30: A4232 Cardiff east.
• There is no Junction 31
• Junction 32: A470 Cardiff north, Merthyr Tydfil.
• Junction 33: Cardiff West services. A4232 Cardiff west, Barry, Penarth, airport.
• Junction 34: A4119 Llantrisant, Rhondda.
• Junction 35: A473 Bridgend, Pen-coed.
• Junction 36: Sarn Park services. A4061 Bridgend, A4063 Maesteg.
• Junction 37: A4229 Porthcawl, Pyle.
• Junction 38: A48 Port Talbot.
• There is no Junction 39
• Junction 40: A4107 Port Talbot.
• Junction 41: A48 Briton Ferry.
• Junction 42: A483 Swansea and ferry.
• Junction 43: A465 Neath, Merthyr Tydfil.
• Junction 44: A48 Swansea east.
• Junction 45: A4067 Swansea, Pontardawe.
• Junction 46: B4489 Swansea north.
• Junction 47: Swansea West services. A483 Swansea west.
• Junction 48: A4138 Pontarddulais, Llanelli.
• Junction 49: End of motorway. Pont Abraham services. A48 Carmarthen, Pontarddulais, A483 Ammanford.