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The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 on the 18.07.26
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 this evening.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 this evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 2h 30m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 this evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 3h 5m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 this evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 3h 40m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 this evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 4h 15m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 this evening.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 yesterday evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 4h 50m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 yesterday evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 5h 25m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 yesterday evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 6h 0m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 yesterday evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 6h 35m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 yesterday evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 7h 10m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 yesterday evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 7h 45m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 yesterday evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 8h 20m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 yesterday evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 8h 55m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 yesterday evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 9h 30m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 yesterday evening.
⏱ Still active — no changes from National Highways. Incident ongoing for 10h 5m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 yesterday evening.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 on the 18.07.26
⏱ Still active — no changes from National Highways. Incident ongoing for 10h 45m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 on the 18.07.26
⏱ Still active — no changes from National Highways. Incident ongoing for 11h 20m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 on the 18.07.26
⏱ Still active — no changes from National Highways. Incident ongoing for 11h 55m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 on the 18.07.26
⏱ Still active — no changes from National Highways. Incident ongoing for 12h 30m. Monitoring continues.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 on the 18.07.26
⏱ Still active — no changes from National Highways. Incident ongoing for 13h 5m. Monitoring continues.
✅ Incident cleared — M4 reopened at 09:55 on 19 Jul 2026. Total disruption: 13h 5m. All lanes open, traffic returning to normal.
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 on the 18.07.26
Wording as published by National Highways, recorded as it changed.
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