M1 crash J23A northbound

Crash on the M1 northbound at J23A on Saturday 31 October 2026, from 12:46. Cleared at 13:38 after 53 min. Timeline of reports from TomTom and the motorway signs.

Status

Cleared 13:38 on 31 Oct 2026, after 53 min

Location

M1 northbound · J23A

Reported as

Collision

At its worst

Stationary traffic

Sources

TomTom · Motorway signs ×3

Timeline

1. Sat 12:46 Motorway signs: “OBSTRUCTION ON SLIP ROAD”
2. Sat 12:46 Motorway signs: “COLLISION SLOW DOWN”
3. Sat 12:46 Motorway signs: “COLLISION [HCA0]”
4. Sat 13:06 TomTom: collision, “Stationary traffic, Incident”, delay ~14 min
5. Sat 13:11 TomTom: now says queueing traffic, delay now ~20 min (was ~14), “Stationary traffic”
6. Sat 13:16 TomTom no longer reports it
7. Sat 13:38 Motorway signs no longer show “COLLISION [HCA0]”
8. Sat 13:38 Motorway signs no longer show “OBSTRUCTION ON SLIP ROAD”
9. Sat 13:38 Motorway signs no longer show “COLLISION SLOW DOWN”
10. Sat 13:38 All clear: no source reports it any more

Source reports

• Stationary traffic
• Overhead signs read “COLLISION [HCA0]” (1 sign; furthest along: M1 northbound within J23A).
• Overhead signs read “OBSTRUCTION ON SLIP ROAD” (1 sign; furthest along: M1 northbound between J23 and J23A).
• Overhead signs read “COLLISION SLOW DOWN” (1 sign; furthest along: M1 northbound within J23A).

Other recent incidents on the M1

• M1 crash J42–J43 northboundyesterday 22:32 · cleared after 1 h 21 min
• M1 crash J43–J42 southboundyesterday 20:39 · cleared after 1 h 44 min
• M1 crash J9–J10 northboundyesterday 19:33 · cleared after 49 min
• M1 crash J17–J16 southboundyesterday 15:34 · cleared after 47 min
• M1 crash J34 northboundyesterday 15:09 · cleared after 42 min
• M1 crash J22–J23 northboundyesterday 14:46 · cleared after 47 min
• M1 crash J20–J21 northboundyesterday 12:30 · cleared after 2 h 51 min
• M1 crash J37–J36 southboundyesterday 08:35 · cleared after 44 min
• M1 stopped traffic J32–J33 northboundyesterday 07:33 · cleared after 1 h 16 min
• M1 crash J8–J9 northboundyesterday 06:00 · cleared after 3 h 31 min

Live traffic and past incidents at M1 J23A.

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