LIVEIncidentM4 westbound between junctions J17 and J18 — There is one of three lanes closed. The hard…13:06 (1:06pm)LIVEIncidentM4 eastbound at junction J17 — There is one of three lanes closed. Lane three is closed13:00 (1pm)LIVERoadworksM4 eastbound between J17 and J16 — Hard shoulder closed13:04 (1:04pm)See all the latest news →LIVEIncidentM4 westbound between junctions J17 and J18 — There is one of three lanes closed. The hard…13:06 (1:06pm)LIVEIncidentM4 eastbound at junction J17 — There is one of three lanes closed. Lane three is closed13:00 (1pm)LIVERoadworksM4 eastbound between J17 and J16 — Hard shoulder closed13:04 (1:04pm)See all the latest news →
50M4 EASTBOUND BETWEEN J3 & J21 signalset 12:57 (12:57pm)Overhead MessageLINK TO M5N CLOSED UNTIL 5 DEC1 signset 09:58 (9:58am)50M4 EASTBOUND J17 ENTRY SLIP1 signalset 12:57 (12:57pm)Overhead MessageQUEUE AHEADEastbound, 2 signsset 13:01 (1:01pm)40M4 EASTBOUND BETWEEN J13 & J121 signalset 12:55 (12:55pm)Overhead MessageQUEUE AHEADWestbound, 2 signsset 13:01 (1:01pm)Overhead MessageQUEUE CAUTIONEastbound, Between J3 & J2set 12:57 (12:57pm)Overhead MessageSTRANDED VEHICLE-SLOWEastbound, 7 signsset 12:53 (12:53pm)See all the overhead messages →See all the speed limit signs →50M4 EASTBOUND BETWEEN J3 & J21 signalset 12:57 (12:57pm)Overhead MessageLINK TO M5N CLOSED UNTIL 5 DEC1 signset 09:58 (9:58am)50M4 EASTBOUND J17 ENTRY SLIP1 signalset 12:57 (12:57pm)Overhead MessageQUEUE AHEADEastbound, 2 signsset 13:01 (1:01pm)40M4 EASTBOUND BETWEEN J13 & J121 signalset 12:55 (12:55pm)Overhead MessageQUEUE AHEADWestbound, 2 signsset 13:01 (1:01pm)Overhead MessageQUEUE CAUTIONEastbound, Between J3 & J2set 12:57 (12:57pm)Overhead MessageSTRANDED VEHICLE-SLOWEastbound, 7 signsset 12:53 (12:53pm)See all the overhead messages →See all the speed limit signs →
Live M4 traffic data from National Highways · updated 13:07 (1:07pm) Sun 25 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
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".
⏳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.
M4M4 Motorway
M4 Eastbound Jct 18 - lane closure (172/2 to 170/4)
PlannedUpdateEastbound
Time now: Sunday, 25 October 2026, 13:07 (1:07pm)
13:04 (1:04pm)25 Oct 2026reported 2 min ago
Location
M4 eastbound between J19 and J18
Direction
Eastbound
Lanes closed
Lane closures
Reason
Other
Schedule
21:00 (9pm) Sun 25 Oct 2026 → 06:00 (6am) Mon 26 Oct 2026
Forecast - not confirmed
🚧HA scheduled: 21:00 (9pm) Sun 25 Oct 2026 → 06:00 (6am) Mon 26 Oct 2026starts in about 8 hours · lasts ~9h 00m
Road closed — on the overhead signs now
National Highways’ overhead signs are showing a road closure, as at 13:07 (1:07pm) Sun 25 Oct 2026.
M4M4 Motorway
LINK TO M5N CLOSED UNTIL 5 DEC
On the signs now Road closed
Time now: Sunday, 25 October 2026, 13:07 (1:07pm)
09:58 (9:58am)25 Oct 2026set 3 hrs ago⚠ 3 hrs old✓ Checked by us 13:07 (1:07pm)
LINK TO M5N CLOSED UNTIL 5 DEC
Overhead Message
WhereM4 westbound, at J19 · on 1 sign
Also onM4 signs only
SinceSet 09:58 (9:58am) Sun 25 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.
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.
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.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.
