LIVERoadworksM4 eastbound between J17 and J16 — Hard shoulder closed20:46 (8:46pm)LIVERoadworksM4 eastbound between J17 and J16 — Hard shoulder closed20:46 (8:46pm)LIVERoadworksM4 eastbound between J19 and J18 — Lane closures20:46 (8:46pm)See all the latest news →LIVERoadworksM4 eastbound between J17 and J16 — Hard shoulder closed20:46 (8:46pm)LIVERoadworksM4 eastbound between J17 and J16 — Hard shoulder closed20:46 (8:46pm)LIVERoadworksM4 eastbound between J19 and J18 — Lane closures20:46 (8:46pm)See all the latest news →
50M4 EASTBOUND BETWEEN J18 & J171 signalset 05:50 (5:50am)Overhead MessageM4 J18-J17 CLOSED20 signsset 20:34 (8:34pm)Overhead MessageJ14-J15 SVCS CLOSED2 signsset 20:05 (8:05pm)Overhead MessageM4 J14 TO J15 MEMBURY SERVICES CLOSED1 signset 20:05 (8:05pm)Overhead MessageWORKFORCE IN ROAD - SLOWWestbound, Between J16 & J17set 19:39 (7:39pm)Overhead MessageLANE CLOSURE SLOW DOWNWestbound, J16 exit slipset 19:39 (7:39pm)See all the overhead messages →See all the speed limit signs →50M4 EASTBOUND BETWEEN J18 & J171 signalset 05:50 (5:50am)Overhead MessageM4 J18-J17 CLOSED20 signsset 20:34 (8:34pm)Overhead MessageJ14-J15 SVCS CLOSED2 signsset 20:05 (8:05pm)Overhead MessageM4 J14 TO J15 MEMBURY SERVICES CLOSED1 signset 20:05 (8:05pm)Overhead MessageWORKFORCE IN ROAD - SLOWWestbound, Between J16 & J17set 19:39 (7:39pm)Overhead MessageLANE CLOSURE SLOW DOWNWestbound, J16 exit slipset 19:39 (7:39pm)See all the overhead messages →See all the speed limit signs →
Live M4 traffic data from National Highways · updated 20:47 (8:47pm) Wed 4 Nov 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".
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: M4 J18-J17 CLOSED. See the overhead signs.
Latest active roadworks on the M4
Roadworks live on the M4 right now.
M4M4 Motorway
M4 eastbound hard shoulder closure (142/6B to 135/2B)
Active nowRoadworksEastbound
Time now: Wednesday, 4 November 2026, 20:47 (8:47pm)
20:46 (8:46pm)4 Nov 2026reported just now
Location
M4 eastbound between J17 and J16
Direction
Eastbound
Lanes closed
Hard shoulder closed
Reason
Maintenance work
Schedule
13:15 (1:15pm) Mon 2 Nov 2026 → 20:00 (8pm) Tue 12 Jan 2027
⏳Long-term works - HA planned end: 20:00 (8pm) Tue 12 Jan 2027.
National Highways’ overhead signs are showing a road closure, as at 20:47 (8:47pm) Wed 4 Nov 2026. 2 other serious messages are on the signs - see them all below.
M4M4 Motorway
M4 J18-J17 CLOSED
On the signs now Road closed
Time now: Wednesday, 4 November 2026, 20:47 (8:47pm)
20:34 (8:34pm)4 Nov 2026set 12 min ago✓ Checked by us 20:47 (8:47pm)
M4 J18-J17 CLOSED
Overhead Message
WhereM4 eastbound, at J20 · on 4 signs
Also onAlso showing on M5 signs
SinceSet 20:34 (8:34pm) Wed 4 Nov 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.
