M4 J16 traffic

No incidents reported at M4 J16 right now.

Updated 05:15 UK time · at J16 and the stretches either side

Right now

Nothing reported at M4 J16 at the moment.

Eastbound J17–J16until 06:002 of 4 lanes closedM4 eastbound single lane running - switching (142/6B to 135/2B)

No closures planned at J16 tonight.

Incidents

Collisions

Road closed

20times

Typical time to clear

1 h 4 minmedian of 57

Busiest time

20:00–21:00

M4 reported crash J17–J16 eastboundSat 17:47 · cleared after 37 min
M4 reported crash J17–J16 eastboundFri 08:09 · cleared after 51 min
M4 reported crash J17–J16 eastboundThu 17:07 · cleared after 49 min
M4 closed J15–J16 westbound27 Oct 2026 23:51 · cleared after 5 h 59 min
M4 closed J15–J16 westbound27 Oct 2026 21:36 · cleared after 2 h 5 min
M4 closed J16–J17 westbound27 Oct 2026 20:10 · cleared after 9 h 17 min
M4 closed J16–J17 westbound27 Oct 2026 20:10 · cleared after 9 h 17 min
M4 closed J15–J16 westbound27 Oct 2026 20:10 · cleared after 50 min
M4 reported crash J17–J16 eastbound24 Oct 2026 11:58 · cleared after 1 h 10 min
M4 crash J16–J1718 Oct 2026 16:05 · cleared after 41 min
M4 reported crash J15–J16 westbound18 Oct 2026 01:38 · cleared after 55 min
M4 stopped traffic J16–J17 westbound16 Oct 2026 14:10 · cleared after 1 h 26 min
M4 reported crash J17–J16 eastbound15 Oct 2026 12:41 · cleared after 1 h 4 min
M4 reported crash J15–J16 westbound10 Oct 2026 12:09 · cleared after 1 h 5 min
M4 closed J16–J17 westbound6 Oct 2026 20:53 · cleared after 7 h 12 min

No incidents have closed it right now.

No closures are planned at J16 tonight.

10 collisions reported at or either side of J16 in the last 90 days, the latest on 31 Oct 2026 at 17:47.

Includes incidents at J16 and on the stretches either side of it. Sources: National Highways, TomTom, TfL and Traffic Wales. Times are UK time.