M25 crash J16–J17 clockwise

Crash on the M25 clockwise at J16–J17 on Thursday 24 September 2026, from 06:43. Cleared at 10:30 after 3 h 47 min. Timeline of reports from TomTom and the motorway signs.

Status

Cleared 10:30 on 24 Sept 2026, after 3 h 47 min

Location

M25 clockwise · J16–J17

Reported as

Collision

Lanes

1 lane closed

At its worst

Stationary traffic · delay ~58 min

Sources

TomTom ×3 · Motorway signs ×4

Timeline

1. Thu 06:43 TomTom: queueing traffic, “Slow traffic”, delay ~5 min
2. Thu 06:52 TomTom: queueing traffic, “Slow traffic”, delay ~3 min
3. Thu 06:53 Motorway signs: “STRANDED VEHICLE-SLOW”
4. Thu 06:56 TomTom: queueing traffic, “Stationary traffic”, delay ~7 min
5. Thu 07:00 TomTom: “Queuing traffic”
6. Thu 07:05 TomTom: delay now ~15 min (was ~9), “Slow traffic”
7. Thu 07:09 TomTom: “Queuing traffic”
8. Thu 07:18 TomTom: “Slow traffic”
9. Thu 07:22 TomTom: delay now ~30 min (was ~23), “Stationary traffic”
10. Thu 07:26 TomTom: “Queuing traffic”
11. Thu 07:31 TomTom: delay now ~58 min (was ~34)
12. Thu 07:39 TomTom: “Slow traffic”
13. Thu 07:39 TomTom: now says broken-down vehicle, “traffic, Broken down vehicle”
14. Thu 07:57 TomTom: now says collision, “Accident, Broken down vehicle”
15. Thu 07:59 Motorway signs: “M25 J16-J17 LANE CLOSED DUE TO COLLISION”
16. Thu 08:09 Motorway signs: “M25 J16 - J17 LANE CLOSED COLLISION”
17. Thu 08:19 Motorway signs: “M25 J16 - J17 LANE CLOSED COLLISION”
18. Thu 08:23 TomTom: “Stationary traffic, Accident”
19. Thu 08:36 TomTom: now says queueing traffic, “Stationary traffic”
20. Thu 09:02 TomTom: “Queuing traffic”
21. Thu 09:04 Motorway signs no longer show “STRANDED VEHICLE-SLOW”
22. Thu 09:04 Motorway signs no longer show “M25 J16 - J17 LANE CLOSED COLLISION”
23. Thu 09:04 Motorway signs no longer show “M25 J16-J17 LANE CLOSED DUE TO COLLISION”
24. Thu 09:04 Motorway signs no longer show “M25 J16 - J17 LANE CLOSED COLLISION”
25. Thu 09:04 All clear: no source reports it any more
26. Thu 09:24 TomTom: “Slow traffic”
27. Thu 09:28 TomTom: “Queuing traffic”
28. Thu 09:37 TomTom: “Slow traffic”
29. Thu 09:42 TomTom: “Queuing traffic”
30. Thu 09:46 TomTom: queueing traffic, “Slow traffic”, delay ~3 min (reported again)
31. Thu 09:47 TomTom: “Slow traffic”
32. Thu 10:30 TomTom no longer reports it
33. Thu 10:30 All clear: no source reports it any more

Source reports

• Slow traffic
• Overhead signs read “STRANDED VEHICLE-SLOW” (1 sign; furthest along: M25 clockwise between J16 and J17).
• Signs on the M4 eastbound read “M25 J16 - J17 LANE CLOSED COLLISION” (2 signs; e.g. M4 eastbound between J5 and J4B). Marker placed near M25 J16–J17 using the signs there, so it is approximate.
• Signs on the M4 westbound read “M25 J16 - J17 LANE CLOSED COLLISION” (2 signs; e.g. M4 westbound between J4 and J4B). Marker placed near M25 J16–J17 using the signs there, so it is approximate.
• Overhead signs read “M25 J16-J17 LANE CLOSED DUE TO COLLISION” (2 signs; e.g. M25 clockwise between J15 and J16). Marker placed near M25 J16–J17 using the signs there, so it is approximate.

Other recent incidents on the M25

• M25 crash J10–J9 anticlockwise02:51 · cleared after 33 min
• M25 crash J27–J28 clockwise02:13 · cleared after 1 h 29 min
• M25 crash J15 anticlockwise00:20 · cleared after 25 min
• M25 crash J11–J10 anticlockwiseyesterday 22:19 · cleared after 52 min
• M25 reported crash J11 anticlockwiseyesterday 21:53 · cleared after 49 min
• M25 crash J16–J17 clockwiseyesterday 14:21 · cleared after 5 h 2 min
• M25 reported crash J11–J12 clockwiseyesterday 13:24 · cleared after 1 h 8 min
• M25 crash J27–J28 clockwiseyesterday 12:31 · cleared after 37 min
• M25 crash J13–J12 anticlockwiseyesterday 06:52 · cleared after 2 h 55 min
• M25 stopped traffic J30yesterday 06:49 · cleared after 2 h 8 min

Live traffic and past incidents at M25 J16 and M25 J17.

The sources don't report causes or injuries, so neither does this page. Times are UK time. For alerts, follow @motorways.me on Bluesky.