2 active closures and restrictions on the M4 right now.
On the M4 right now: 2 restrictions (roadworks or queues). No collisions or breakdowns are reported. Listed first: J26 Malpas to J24 Coldra, Congestion, Delays possible :, J26 Malpas to J24 Coldra (Traffic Wales).
Updated at 07:22 · refreshes every 5 min
No. Nothing unplanned is reported on the M4 right now: no collisions, breakdowns or obstructions in the National Highways feed. 2 unplanned incidents on the M4 have been reported and cleared since midnight. The latest to clear was a lane closure at J8 to J10 westbound, reported at 05:50 and cleared by 06:15.
M4 accidents →Yes. 3 full closures are planned on the M4 tonight, starting with M4 eastbound Jct 19 to Jct 18 carriageway closure (Tonight 21:00 to 06:00). There are also 9 lane or slip road closures.
M4 closures tonight →The M4 stays open this weekend, but 1 lane or slip road closure is planned, so expect narrower lanes or a shut slip at that junction.
M4 closures this weekend →J26 Malpas to J24 Coldra (Traffic Wales)
M4 eastbound between J17 and J16
Collisions, breakdowns and obstructions reported since midnight and now cleared. We check the National Highways feed every 5 minutes, so a cleared time is accurate to about 5 minutes.
M4 westbound between J8 and J10 · set on the overhead signals
M4 westbound between J8 and J10 · set on the overhead signals
M4 westbound between J17 and J18
M4 eastbound between J20 and J19
M4 eastbound between J15 and J14
M4 eastbound between J18 and J17
M4 eastbound between J19 and J18
link road from A4 to M4 J7
Powered by National Highways’ Transport Data Feeds
The M4 is busiest around 16:00, and at the sensors along this route it keeps moving: even in that hour traffic averages 52.2 mph.
Typical weekday pattern from 5 National Highways roadside sensors along the route, June 2026. Bar height is traffic volume, colour is average speed. Overnight hours carry too little traffic to judge, so they are shown as quiet.
Junction data © OpenStreetMap contributors
The M4 runs west out of London past Heathrow, Reading and Swindon, over the Prince of Wales Bridge and into South Wales as far as Pont Abraham. The smart-motorway section between J3 and J12 and the Brynglas Tunnels at Newport are its two best-known bottlenecks. Welsh-side incidents come from Traffic Wales; English-side from National Highways. Everything refreshes every 5 minutes.