M4 crash J11–J12 westbound

Crash on the M4 westbound at J11–J12 on Saturday 24 October 2026, from 16:18. Cleared at 17:29 after 1 h 11 min. Timeline of reports from the motorway signs.

Status

Cleared 17:29 on 24 Oct 2026, after 1 h 11 min

Location

M4 westbound · J11–J12

Reported as

Collision

Sources

Motorway signs

Timeline

1. Sat 16:18 Motorway signs: “COLLISION ON SLIP ROAD[HCA0]”
2. Sat 17:29 Motorway signs no longer show “COLLISION ON SLIP ROAD[HCA0]”
3. Sat 17:29 All clear: no source reports it any more

Source reports

• Overhead signs read “COLLISION ON SLIP ROAD[HCA0]” (1 sign; furthest along: M4 westbound between J11 and J12).

Other recent incidents on the M4

• M4 crash J10–J8 eastboundyesterday 16:33 · cleared after 1 h 18 min
• M4 crash Eastboundyesterday 09:44 · cleared after 25 min
• M4 crash Westboundyesterday 08:29 · cleared after 40 min
• M4 crash Prince of Wales Bridge eastboundyesterday 08:13 · cleared after 22 min
• M4 stopped traffic J3–J2yesterday 06:48 · cleared after 2 h 13 min
• M4 crash J10–J11 westboundSun 05:12 · cleared after 1 h
• M4 crash J12–J11 eastboundSun 04:41 · cleared after 1 h 31 min
• M4 reported crash J17–J16 eastboundSat 17:47 · cleared after 37 min
• M4 reported crash J17 westboundSat 17:47 · cleared after 37 min
• M4 stopped traffic J3–J2Sat 09:48 · cleared after 25 min

Live traffic and past incidents at M4 J11 and M4 J12.

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