M4 crash J4 eastbound

Crash on the M4 eastbound at J4 on Saturday 17 October 2026, from 23:21. Cleared at 01:32 after 2 h 11 min. Timeline of reports from the motorway signs and National Highways.

Status

Cleared 01:32 on 18 Oct 2026, after 2 h 11 min

Location

M4 eastbound · J4

Reported as

Collision

Lanes

Road closed

Sources

Motorway signs ×4 · National Highways

Timeline

1. yesterday 23:21 Motorway signs: “REPORT OF COLLISION”
2. yesterday 23:52 Motorway signs: “COLLISION [HCA0]”
3. yesterday 23:55 National Highways: road closed
4. 00:02 Motorway signs no longer show “REPORT OF COLLISION”
5. 00:03 Motorway signs: “STRANDED VEHICLE”
6. 00:32 Motorway signs no longer show “COLLISION [HCA0]”
7. 00:47 Motorway signs: “COLLISION [HCA0]”
8. 01:02 Motorway signs no longer show “STRANDED VEHICLE”
9. 01:25 National Highways: road reopened
10. 01:32 Motorway signs no longer show “COLLISION [HCA0]”
11. 01:32 All clear: no source reports it any more

Source reports

• Overhead signs read “REPORT OF COLLISION” (3 signs; furthest along: M4 eastbound within J4).
• Overhead signs read “COLLISION [HCA0]” (2 signs; furthest along: M4 eastbound between J4B and J4).
• M4 eastbound within J4
• Overhead signs read “STRANDED VEHICLE” (1 sign; furthest along: M4 eastbound within J4B).

Other recent incidents on the M4

• M4 crash J8–J10 westboundyesterday 12:37 · cleared after 51 min
• M4 closed J14–J15 westboundFri 21:09 · cleared after 2 h 5 min
• M4 crash WestboundFri 16:05 · cleared after 35 min
• M4 crash J10–J8 eastboundFri 15:33 · cleared after 2 h 3 min
• M4 stopped traffic J16–J17 westboundFri 14:10 · cleared after 1 h 26 min
• M4 reported crash J4–J4B westboundFri 05:29 · cleared after 1 h 21 min
• M4 crash J10–J8 eastboundThu 22:50 · cleared after 57 min
• M4 reported crash J17–J16 eastboundThu 12:41 · cleared after 1 h 4 min
• M4 crash J4 eastboundThu 07:16 · cleared after 57 min
• M4 reported crash J3 westboundThu 06:02 · cleared after 1 h 40 min

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