M4
Map of M4 Motorway Junctions
Map of the M4 motorway junctions.
Westbound Eastbound
Westbound Eastbound Showing live speeds westbound . The map shows one direction at a time; tap the other button to switch. For both directions side by side, with every sign and incident, see the live M4 speed flow map .
Map of the M4 in England, from junction 1 to junction 23, with the towns along it
Barnes Usk Hurst Upper Lambourn Wick Wisteria (attraction) Hammersmith bridge (attraction) The Children's Garden (attraction) Stop 6 - The Orangery (attraction) Krāsainās mājas (attraction) Log trail & Giant badger sett (attraction) Royal Kitchens (attraction) The Cosmic House (attraction) Otters (attraction) Stag Beetle Loggery (attraction) Cape Barren Goose (attraction) Goose's Foot (attraction) Stop 1 - Victoria Gate (attraction) Sarm West Studios (attraction) Stop 3 - The Great Pagoda (attraction) Stop 2 - Temperate House (attraction) Exedra (attraction) Stop 5 - Brentford Gate (attraction) The Food Market Chiswick (attraction) Stop 4 - Natural Area (attraction) Big dining table with chairs (attraction) Rose Column (attraction) Marquee (attraction) Deer House (attraction) Inigo Jones Gateway (attraction) Southall Railway Centre (attraction) Kyoto Garden (attraction) Garden Lodge - Freddie Mercury's last home (attraction) Ionic Temple (attraction) Pagoda (attraction) Ham House (attraction) Police Box (attraction) Conservatory (attraction) Pembroke Lodge Gardens (attraction) Eye Catcher (attraction) Amphitheatre (attraction) Millennium Maze (attraction) Kew Palace (attraction) Chiswick House (museum) William Morris Society (museum) Pitzhanger Manor House and Gallery (museum) World Rugby Museum (museum) Twickenham Museum (museum) Museum of Richmond (museum) The Mosaic Rooms (museum) Elephant West (museum) Chelsea FC Museum and Stadium Tours (museum) Leighton House Museum (museum) Toll House (museum) Design Museum (museum) The Musical Museum (museum) Eel Pie Island Museum (museum) Boston Manor (museum) Transport Museum Depot (museum) Museum of Brands (museum) Hogarth's House (museum) The Ealing Doll House (museum) Sambourne House (museum) London Museum of Water and Steam (museum) Marble Hill House (museum) Gunnersbury Park Museum (museum) Snail Reserve (nature reserve) Ecology Centre (nature reserve) Crane Park Island Nature Reserve (nature reserve) Paradise Fields (nature reserve) Pevensey Road Nature Reserve (nature reserve) Blondin Park Nature Reserve (nature reserve) Perivale Wood Local Nature Reserve (nature reserve) Birds area (nature reserve) Gunnersbury Triangle Local Nature Reserve (nature reserve) Play Service Nature Area (nature reserve) Isleworth Ait (nature reserve) Hounslow Heath (nature reserve) WISE Project (nature reserve) Montpelier Park Woodland (nature reserve) Litten Local Nature Reserve (nature reserve) Lost River Park (nature reserve) Warren Farm Nature Reserve (nature reserve) Hanwell Zoo (zoo) California Country Park (attraction) Wellington Country Park (attraction) Abbey Ruins (attraction) Abbey Ruins (attraction) Cole Museum of Zoology (museum) The Royal Berkshire Medical Museum (museum) The Ure Museum of Greek Archaeology (museum) Riverside Museum at Blake's Lock (museum) Riverside Museum at Blake's Lock (museum) The Museum Of Berkshire Aviation (museum) British Museum Archaeological Research Collection (museum) Longmoor Bog Nature Reserve (nature reserve) Larks Hill (nature reserve) Loddon Nature Reserve (nature reserve) Maiden Erlegh Nature Reserve (nature reserve) Millenium Arboretum (nature reserve) Shepperlands Farm (nature reserve) Dingley Dell (nature reserve) View Island (nature reserve) Highwood Local Nature Reserve (nature reserve) TeamSport Indoor Karting (attraction) Mapledurham House (attraction) Reading Museum (museum) Moor Copse (nature reserve) Hosehill Lake Local Nature Reserve (nature reserve) Kennett Island wildlife conservation area (nature reserve) Fobney Island Wetland Nature Reserve (nature reserve) Hartslock (nature reserve) Beale Park (zoo) Guinea Pig Village (attraction) Newbury Show Ground (attraction) West Berkshire Museum (museum) Snelsmore Common Country Park (SSSI) (nature reserve) Sole Common Pond (nature reserve) Rack Marsh (nature reserve) The Living Rain Forest (zoo) Bucklebury Farm Park (zoo) Kintbury Newt Ponds (nature reserve) Watts Bank (nature reserve) Ditcheat Manor 7821 (attraction) Museum & Art Swindon (museum) Museum of Computing (museum) Aldbourne Heritage Centre (museum) Richard Jefferies Museum (museum) Chiseldon Museum (museum) STEAM - Museum of the Great Western Railway (museum) Clouts Wood Nature Reserve (nature reserve) Coate Water Local Nature Reserve (nature reserve) Seven Fields (nature reserve) Rushey Platt Nature Reserve (nature reserve) The Coombes (nature reserve) Swindon Lagoons (nature reserve) High Clear Down (nature reserve) Studley Grange Butterfly Gardens and Craft Centre (attraction) Broad Town White Horse (attraction) Purton Museum (museum) Royal Wottoon Bassett Museum (museum) Lydiard House (museum) Stoke Common Meadows (nature reserve) Echo Lodge Meadows (nature reserve) Hagbourne Copse (nature reserve) Wootton Bassett Mud Springs (nature reserve) Wiltshire and Swindon History Centre (museum) Vincients Wood (nature reserve) Sutton Lane Meadows (nature reserve) Corston Quarry and Pond Local Nature Reserve (nature reserve) Birds Marsh (nature reserve) Dyrham Park (attraction) Yate Heritage Centre (museum) Wapley Bushes Nature Reserve (nature reserve) Jekka's Herb Farm (attraction) Acton Court (attraction) Concorde 216 (attraction) The George Müller Museum (museum) Glenside Hospital Museum (museum) Frenchay Village Museum (museum) Aerospace Bristol (museum) Kingswood Heritage Museum (museum) Magpie Bottom Nature Reserve (nature reserve) Huckford Quarry LNR (nature reserve) Coombe Brook Nature Reserve (nature reserve) Royate Hill Local Nature Reserve (nature reserve) Warmley Forest Park (nature reserve) Three Brooks Nature Reserve (nature reserve) Monks Pool LNR (nature reserve) The Tumps (nature reserve) Bradley Brook LNR (nature reserve) Troopers Hill Local Nature Reserve (nature reserve) Bristol Zoo Project (zoo) Yeading Brook Meadow (nature reserve) Causeway (nature reserve) Yeading Brook Meadows (nature reserve) Huckerby's Meadows (nature reserve) Cranebank (nature reserve) Old Down Country Park (attraction) The Pump (attraction) Thornbury and District Museum (museum) Pilning Wetland Farm & Reserve (nature reserve) Littleton Brick Pits Nature Reserve (nature reserve) St. Tewdric's Well (attraction) Dewstow Hidden Garden and Grotto (attraction) Caldicot Castle Museum (museum) Coombe Valley Woods National Nature Reserve (nature reserve) Magor Marsh SSSI (nature reserve) Stay Balanced Alpaca Experiences (attraction) In the Nick of Time (Festival Clock) (attraction) Newport Medieval Ship museum (museum) Great Traston Meadows (nature reserve) 19 Hills (nature reserve) The Courtyard Of Windows (attraction) Concorde G-BOAB (attraction) Bedfont Lakes country park visitors area. (attraction) Bedfont Lake's Country Park rangers hut and information centre. (attraction) Harmondsworth Great Barn (attraction) Colnbrook Museum (museum) Battle of Britain Bunker - RAF Uxbridge (museum) Heathrow Biodiversity Site - Peggy Bedford (nature reserve) Colne Valley Biodiversity Site (nature reserve) The Grove Nature Reserve (nature reserve) Cain's Lane Open Space (nature reserve) Two Bridges (nature reserve) Staines Moor (nature reserve) Ten Acres (nature reserve) Heathrow Colne Valley Biodiversity Site (nature reserve) Colne Valley Biodiversity Site (nature reserve) Heathrow Colne Valley Biodiversity Site (nature reserve) Frays Island & Mabey's Meadow Nature Reserve (nature reserve) Hardings Row Millenium Nature Reserve (nature reserve) Bedfont lakes nature reserve. (nature reserve) Alice's Treehouse (attraction) Ankerwycke Yew (attraction) St Mary's Priory (attraction) Runnymede Pleasure Ground (attraction) Magna Carta Monument (attraction) Arthur Jacob Nature Reserve (nature reserve) Blue Airmail Pillar Box (attraction) Kennedy Memorial (attraction) Ancient Well (attraction) Queen Mary's Dolls' House (attraction) Crooked House of Windsor (attraction) Windsor Castle (attraction) Windsor & Royal Borough Museum (museum) Pug Yard Learning Centre (museum) Deep Sea Adventure (aquarium) The Cage Pollard (attraction) Heartlake City (attraction) LEGO City (attraction) DUPLO Valley (attraction) Kingdom Of The Pharaohs (attraction) Druid's Oak (attraction) Knight's Kingdom (attraction) Enchanted Forest (attraction) The Old Pump (attraction) The Beginning (attraction) Pirate Shores (attraction) Miniland (attraction) Adventure Land (attraction) The Dragon's Apprentice (attraction) Imagination (attraction) Haunted House Monster Party (attraction) Dragon (attraction) The Royal Windsor Maze (attraction) Pirate Falls: Treasure Quest (attraction) Balloon School (attraction) Slough Museum (museum) Berkshire Yeomanry Museum (museum) Museum of Antiquities (museum) Eton Natural History Museum (museum) Cocksherd Wood (nature reserve) Haymill Valley (nature reserve) Legoland Windsor (theme park) The Sounding Arch (attraction) Maidenhead Bridge (attraction) Stanley Spencer Gallery (museum) Maidenhead Heritage Centre (museum) Braywick Park (nature reserve) Littleworth Common (nature reserve) Chawridge Bank (nature reserve) Braywick Park Nature Reserve (nature reserve) Bray Pit (nature reserve) Ivor Novello's House (attraction)
Section 1 Section 2 Section 3 Section 4
J1 J2 J3 J4 J4B J5 J6 J7 J8/9 J10 J11 J12 J13 J14 J15 J16 J17 J18 J19 J20 J21 J22 J23 M5 M25 M48 M32 M49
Map data © OpenStreetMap contributors © Corporate Ace Limited
Map data © OpenStreetMap contributors . Map drawing © Corporate Ace Limited.
This map shows the M4 in England, junctions 1 to 23. The M4 in Wales, junctions 23 to 49, has its own map .
West M4
To the West the M4 joins the M5 at M4 Junction 20 which heads north to Devon Cornwall and the South West of England.
The Western end of the M4 is in South Wales Junctions 23 to 48.
Bridgend is on Junctions 25 to 37, M4 Junctions 44 and 45 for Swansea,
Junctions 30 to 33 for Cardiff and Junctions 24 to 28 for Newport.
East M4
At the eastern end of the M4 is London, with Junctions for Slough,
Reading, Newbury, Swindon and Bristol on the way to Wales in the West.
How Do I Find M4 Traffic News?
Simply
type the search words in the search facility towards the top right of this page and click "search".
Search all the latest M4 traffic news
Latest accident or incident on the M4 The most recent accident or incident on the M4 that we are aware of.
M4 M4 Motorway
M4 westbound between junctions J19 and J20 : broken down vehicle Active now Incident Westbound
Time now: Monday, 26 October 2026, 13:22 (1:22pm)
13:16 (1:16pm) 26 Oct 2026 reported 6 min ago
Location M4 westbound between junctions J19 and J20
Direction Westbound
Lanes closed There is one of four lanes closed. Lane one is closed
Reason Broken down vehicle
Schedule 10:56 (10:56am) Mon 26 Oct 2026 → 14:41 (2:41pm) Mon 26 Oct 2026
⏳ Expected to clear in ~1h 19m HA planned end: 14:41 (2:41pm) Mon 26 Oct 2026
Latest active roadworks on the M4 Roadworks live on the M4 right now.
M4 M4 Motorway
Hardshoulder closure Active now Roadworks Eastbound
Time now: Monday, 26 October 2026, 13:22 (1:22pm)
13:11 (1:11pm) 26 Oct 2026 reported 10 min ago
Location M4 eastbound between J17 and J16
Direction Eastbound
Lanes closed Hard shoulder closed
Reason Roadworks
Schedule 23:59 (11:59pm) Tue 27 Apr 2021 → 18:00 (6pm) Fri 30 July 2027
⏳ Long-term works - HA planned end: 18:00 (6pm) Fri 30 July 2027 .
Latest planned roadworks on the M4 The next planned roadworks scheduled on the M4.
M4 M4 Motorway
M4 both directions Jct 15 to 22 - mobile lane closure Planned Roadworks Both directions
Time now: Monday, 26 October 2026, 13:22 (1:22pm)
13:11 (1:11pm) 26 Oct 2026 reported 10 min ago
Location M4 eastbound between J18 and J17
Direction Both directions
Lanes closed Lane closures
Reason Maintenance work
Schedule 20:00 (8pm) Mon 26 Oct 2026 → 06:00 (6am) Tue 27 Oct 2026
Forecast - not confirmed
🚧 HA scheduled: 20:00 (8pm) Mon 26 Oct 2026 → 06:00 (6am) Tue 27 Oct 2026 starts in about 7 hours · lasts ~10h 00m
+ 14 more planned roadworks - search all M4 traffic news →
Search all the latest M4 traffic news
Updated 13:22 (1:22pm) Mon 26 Oct 2026
Powered by National Highways’ Transport Data Feeds.
M4 junctions — west to east
▲ WEST South Wales & Pont Abraham
J49 A48/A483 Pont Abraham — M4 ends (for Llanelli, Ammanford) Pont Abraham services at J49 J48 A4138 Hendy, Llanelli, Pontarddulais J47 A48 Penllergaer, Gorseinon, Swansea (west) Swansea West services at J47 J46 A48 Llangyfelach, Morriston J45 A4067 Ynystawe, Clydach, Swansea Valley J44 A48/A48 Llansamlet, Swansea (east) J43 A465 Llandarcy, Neath, Heads of the Valleys J42 A483 Earlswood, Briton Ferry J41 A48 Baglan, Port Talbot (west) J40 A48 Port Talbot, Aberavon J39 A48 Cwmavon (west-facing only) J38 A48 Margam, Kenfig J37 A4229 Pyle, Porthcawl, Cornelly J36 A4061/A4063 Sarn, Maesteg, Bridgend (north) Sarn Park services at J36 J35 A473 Pencoed, Bridgend (east) J34 A4119 Miskin, Llantrisant, Talbot Green J33 A4232 Cardiff West, Capel Llanilltern Cardiff West services at J33 J32 A470 Coryton, Cardiff (north), Merthyr Tydfil J30 A4232 Cardiff Gate, Pentwyn Cardiff Gate services at J30 J29 A48(M) Castleton — A48(M) for Cardiff (east) J28 A48 Newport (west), Tredegar Park J27 B4591 High Cross, Newport (Rogerstone) J26 A4051 Malpas, Newport (north) J25a A4042 Newport (Brynglas) J25 B4596 Caerleon, Newport (east) J24 A48 Coldra, Newport (east), Chepstow (A48) J23a A4810 Magor, Llanwern Magor services at J23a J23 M48 M48 — old Severn Bridge / Chepstow J22 M49 M49 — Avonmouth link to the M5 J21 M48/A403 M48 & Severn crossings, Aust J20 M5 Almondsbury — M5 interchange (Midlands / South West) J19 M32 M32 — Bristol city centre J18 A46 Tormarton, Bath, Stroud Leigh Delamere services between J17 and J18 J17 A350 Chippenham, Cirencester J16 A3102 Swindon (west), Wootton Bassett J15 A419 Swindon (east), Cirencester, Marlborough Membury services between J14 and J15 J14 A338 Hungerford, Wantage, Great Shefford J13 A34 Chieveley, Newbury — A34 for Oxford / Southampton Chieveley services at J13 J12 A4 Theale, Reading (west) Reading services between J11 and J12 J11 A33 Reading (central), Basingstoke (A33) J10 A329(M) Wokingham, Bracknell, Reading (east) J8/9 A404(M)/A308(M) Maidenhead, High Wycombe, Marlow J7 A4 Slough (west), Huntercombe J6 A355 Slough (central), Windsor, Eton J5 A4 Langley, Slough (east), Datchet J4b M25 M25 interchange (London orbital) J4 A408 Heathrow Airport, Uxbridge J3 A312 Hayes, Southall, Heathrow (A312) Heston services between J2 and J3 J2 A4 Brentford, Chiswick (A4) J1 A4/A406 Chiswick — A4 & North Circular (London)
▼ EAST London & the A4 / North Circular
The M4 runs ~189 miles between London and South Wales, crossing the Severn. It meets the M25 (J4b), M32 (J19), M5 (J20), M48 (J21/J23) and M49 (J22). Tap Latest M4 Traffic News and search a junction for live updates.
Also travelling on the M25? The M4 meets the M25 London orbital motorway at Junction 4b. If your journey also uses the M25, see our sister site M25 Traffic for the latest M25 traffic news and updates in the same easy-to-use format.
