M4 crash J18–J17 eastbound

Crash on the M4 eastbound at J18–J17 on Monday 19 October 2026, from 06:45. Still reported at 08:50 UK time. Timeline of reports from TomTom and the motorway signs.

Status

Live since 06:45 (2 h 6 min)

Location

M4 eastbound · J18–J17

Reported as

Collision

Delay

~46 min

At its worst

Stationary traffic · delay ~98 min

Sources

TomTom ×2 · Motorway signs ×2

Timeline

1. 06:45 TomTom: collision, “Stationary traffic, Incident”, delay ~20 min
2. 06:54 TomTom: delay now ~38 min (was ~24)
3. 07:06 Motorway signs: “DEBRIS IN ROAD - SLOW”
4. 07:17 TomTom: delay now ~68 min (was ~50)
5. 07:30 TomTom: queueing traffic, “Queuing traffic”, delay ~4 min
6. 07:35 TomTom: delay now ~12 min (was ~4), “Stationary traffic”
7. 07:35 TomTom: delay now ~86 min (was ~66)
8. 07:40 TomTom: delay now ~17 min (was ~12)
9. 07:43 Motorway signs: “INCIDENT SLOW DOWN”
10. 08:09 Motorway signs no longer show “DEBRIS IN ROAD - SLOW”
11. 08:16 TomTom: “Queuing traffic”
12. 08:35 TomTom: “Stationary traffic”
13. 08:48 TomTom: “Queuing traffic”

Source reports

• Stationary traffic, Incident
• Queuing traffic
• Overhead signs read “DEBRIS IN ROAD - SLOW” (1 sign; furthest along: M4 eastbound within J18).
• Overhead signs read “INCIDENT SLOW DOWN” (1 sign; furthest along: M4 eastbound between J19 and J18).

Other recent incidents on the M4

• M4 crash J15–J14 eastboundyesterday 18:24 · cleared after 1 h 36 min
• M4 stopped traffic J13–J14yesterday 17:28 · cleared after 1 h 9 min
• M4 crash J13–J12 eastboundyesterday 16:17 · cleared after 1 h 30 min
• M4 crash J16–J17yesterday 16:05 · cleared after 41 min
• M4 reported crash J15–J16 westboundyesterday 01:38 · cleared after 55 min
• M4 crash J4 eastboundSat 23:21 · cleared after 2 h 11 min
• M4 crash J8–J10 westboundSat 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

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