M3 | Hampshire | Road Closure | Expect Delays

Incident timeline

1. 20:14, 18 JulFirst report

   The M3 in Hampshire is closed westbound between J7 (near Dummer, Basingstoke) and J9 near (Winchester) due to a serous collision.

2. 20:25, 18 JulUpdate

   The M3 in Hampshire is closed westbound between J7 (near Dummer, Basingstoke) and J9 near (Winchester) due to a serous collision.

3. 21:00, 18 JulUpdate

   ⏱ Still active — no changes from National Highways. Incident ongoing for 46 minutes. Monitoring continues.

4. 21:05, 18 JulUpdate

   The M3 in Hampshire is closed westbound between J7 (near Dummer, Basingstoke) and J9 near (Winchester) due to a serous collision.

5. 21:35, 18 JulUpdate

   ⏱ Still active — no changes from National Highways. Incident ongoing for 1h 21m. Monitoring continues.

6. 21:40, 18 JulUpdate

   The M3 in Hampshire is closed westbound between J7 (near Dummer, Basingstoke) and J9 near (Winchester) due to a serous collision.

7. 22:10, 18 JulUpdate

   ⏱ Still active — no changes from National Highways. Incident ongoing for 1h 56m. Monitoring continues.

8. 22:15, 18 JulUpdate

   The M3 in Hampshire is closed westbound between J7 (near Dummer, Basingstoke) and J9 near (Winchester) due to a serous collision.

9. 22:45, 18 JulUpdate

   ⏱ Still active — no changes from National Highways. Incident ongoing for 2h 31m. Monitoring continues.

10. 22:45, 18 JulUpdate

    ✅ Incident cleared — M3 reopened at 22:45 on 18 Jul 2026. Total disruption: 2h 31m. All lanes open, traffic returning to normal.

11. 21:46, 5 NovFinal update

    The M3 in Hampshire is closed westbound between J7 (near Dummer, Basingstoke) and J9 near (Winchester) due to a serous collision.

Wording from National Highways, recorded as it changed.

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