CollisionJ10 → J10a · NB
Two lanes closed after multi-vehicle collision
Lanes 2 and 3 of 4 closed. Recovery on scene, congestion building on the approach.
+40min
Delays of 40 minnorthbound between J10 and J10a after a collision.
Updated just now · refreshes every 5 min
Lanes 2 and 3 of 4 closed. Recovery on scene, congestion building on the approach.
Narrow lanes through the works with average speed cameras in operation.
All lanes reopened. Residual delays easing.
Follow the signed hollow-square diversion via the local A-road network.
Powered by National Highways’ Transport Data Feeds
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.