M1 J21A traffic

No incidents reported at M1 J21A right now.

Updated 03:29 UK time · at J21A and the stretches either side

Right now

Nothing reported at M1 J21A at the moment.

Southbound J22–J21Auntil 06:001 of 4 lanes closedLane 1 closure southbound
Southbound J22–J21Auntil 06:001 of 4 lanes closedLane 1 closure southbound site 2

No closures planned at J21A tonight.

Incidents

Collisions

Road closed

3times

Typical time to clear

1 h 5 minmedian of 58

Busiest time

13:00–14:00

M1 crash J20–J21 northboundyesterday 12:30 · cleared after 2 h 51 min
M1 crash J21–J20 southboundSun 17:36 · cleared after 2 h 39 min
M1 crash J22–J21A southboundThu 14:36 · cleared after 4 h 59 min
M1 reported crash J21A–J22 northbound26 Oct 2026 22:05 · cleared after 1 h
M1 reported crash J21A–J21 southbound25 Oct 2026 12:51 · cleared after 43 min
M1 crash J21A–J21 southbound24 Oct 2026 21:03 · cleared after 1 h 10 min
M1 reported crash J22–J21A southbound24 Oct 2026 20:44 · cleared after 46 min
M1 crash J21–J21A southbound24 Oct 2026 15:28 · cleared after 1 h 31 min
M1 crash J20–J21 northbound24 Oct 2026 12:21 · cleared after 2 h 18 min
M1 crash J21A–J21 southbound22 Oct 2026 13:41 · cleared after 47 min
M1 stopped traffic J21A–J21 southbound20 Oct 2026 16:38 · cleared after 5 h 25 min
M1 crash J21A–J21 southbound19 Oct 2026 06:43 · cleared after 6 h 27 min
M1 crash J22–J21A northbound16 Oct 2026 14:30 · cleared after 3 h 36 min
M1 crash J21A–J22 northbound16 Oct 2026 13:06 · cleared after 4 h 27 min
M1 crash J21A–J2114 Oct 2026 10:48 · cleared after 2 h 1 min

No incidents have closed it right now.

No closures are planned at J21A tonight.

24 collisions reported at or either side of J21A in the last 90 days, the latest on 2 Nov 2026 at 12:30.

Includes incidents at J21A and on the stretches either side of it. Sources: National Highways, TomTom, TfL and Traffic Wales. Times are UK time.