Tonight
Is the M4 closed tonight?
Yes. 2 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 7 lane or slip road closures.
2 full closures on the M4 in the next 18 hours. 7 lane or slip road closures as well. For live incidents see M4 traffic.
Updated at 06:02
Yes. 2 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 7 lane or slip road closures.
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 eastbound between J18 and J17
M4 westbound between J17 and J18
M4 eastbound between J17 and J16
M4 eastbound between J18 and J17
M4 J19 eastbound access
M4 eastbound between J19 and J18
M4 eastbound between J23 and J22
M4 eastbound within J5
J46 Llangyfelach · Traffic Wales
J47 Penllergaer · Traffic Wales
J44 Lon Las · Traffic Wales
J44 Lon Las · Traffic Wales
J39 Groes · Traffic Wales
J38 Margam · Traffic Wales
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.
Junction names © OpenStreetMap contributors