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M4 Traffic

Map of the M4 Motorway

0Accidentsnone in National Highways’ incident data — but the overhead signs show LINK TO M5N CLOSED UNTIL 5 DEC — see the signs2Roadworks activelive on the M4 right now — see details8Plannedscheduled on the M4 — see details

Live M4 traffic data from National Highways · updated 12:42 (12:42pm) Fri 23 Oct 2026

M4

Map of M4 Motorway Junctions

Map of the M4 motorway junctions.

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.

60 mph +50–5930–4915–29under 15closedno live reading
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.

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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.

No accident is listed in National Highways’ incident data for the M4 right now, but the overhead signs are showing: LINK TO M5N CLOSED UNTIL 5 DEC. See the overhead signs.

Latest active roadworks on the M4

Roadworks live on the M4 right now.

  • M4 eastbound Jct 18 to 17 lane closure (166/5 to 162/1)

    Active nowRoadworksEastbound
    Time now: Friday, 23 October 2026, 12:42 (12:42pm)

    12:33 (12:33pm)23 Oct 2026reported 8 min ago

    Location
    M4 eastbound between J18 and J17
    Direction
    Eastbound
    Lanes closed
    Lane closures
    Reason
    Maintenance work
    Schedule
    07:00 (7am) Fri 23 Oct 2026 → 18:00 (6pm) Fri 23 Oct 2026
    ⏳Expected to clear in ~5h 17m HA planned end: 18:00 (6pm) Fri 23 Oct 2026

    • + 1 more active roadworks - search all M4 traffic news →

    Latest planned roadworks on the M4

    The next planned roadworks scheduled on the M4.

  • M4 eastbound Jct 13 between the slips carriageway closure

    PlannedRoadworksEastbound Road closed
    Time now: Friday, 23 October 2026, 12:42 (12:42pm)

    12:33 (12:33pm)23 Oct 2026reported 8 min ago

    Location
    M4 eastbound between J14 and J13
    Direction
    Eastbound
    Lanes closed
    Carriageway closed
    Reason
    Roadworks
    Schedule
    21:00 (9pm) Fri 23 Oct 2026 → 06:00 (6am) Sat 24 Oct 2026

    Forecast - not confirmed

    🚧HA scheduled: 21:00 (9pm) Fri 23 Oct 2026 → 06:00 (6am) Sat 24 Oct 2026 starts in about 8 hours · lasts ~9h 00m

    • + 7 more planned roadworks - search all M4 traffic news →

    Road closed — on the overhead signs now

    National Highways’ overhead signs are showing a road closure, as at 12:42 (12:42pm) Fri 23 Oct 2026.

    • LINK TO M5N CLOSED UNTIL 5 DEC

      On the signs now Road closed
      Time now: Friday, 23 October 2026, 12:42 (12:42pm)

      10:42 (10:42am)23 Oct 2026set 2 hrs ago✓ Checked by us 12:42 (12:42pm)

      LINK TO M5N
      CLOSED
      UNTIL
      5 DEC

      Overhead Message

      WhereM4 westbound, at J19 · on 1 sign
      Also onM4 signs only
      SinceSet 10:42 (10:42am) Fri 23 Oct 2026
      We check these overhead signs at least every five minutes, but we can't guarantee a sign is still current if an incident or issue has been cleared and the sign has not been updated yet. Signs and news can each carry something the other does not - check both before you travel.

    See all the M4 overhead signs

    Search all the latest M4 traffic news

    Updated 12:42 (12:42pm) Fri 23 Oct 2026

    Powered by National Highways’ Transport Data Feeds.

    M4 junctions — west to east

    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.

    M4traffic.co.uk is dedicated to the latest M4 traffic news, checked every five minutes, 24 hours a day. The M4 meets the M25 at Junction 4b near Heathrow and the M5 near Bristol — see M25 Traffic and M5 Traffic.