A1 crash Mill Hill Circus northbound

Cleared Cleared at 10:12 on 30 Sept 2026, after 16 min.

Crash on the A1 northbound at Mill Hill Circus on Wednesday 30 September 2026, from 09:56. Cleared at 10:12 after 16 min. Timeline of reports from TfL.

1. !

   A1 northbound · Mill Hill Circus

   Collision

   09:56–10:12 (cleared after 16 min)

   TfL

See the A1 on the live map A1 traffic now

Timeline

1. 09:56 TfL: collision
2. 10:12 TfL no longer reports it
3. 10:12 All clear: no source reports it any more

What the sources said

• [A1] Mill Hill Circus (Clockwise) at the junction of [A1] Watford Way - Lane one (of two) clockwise onto Watford Way northbound towards Apex Corner is blocked by a collision. Traffic is flowing well past the incident.

Other recent incidents on the A1

• A1 stopped traffic · Mon 16:37, cleared after 46 min
• A1 closed · Thu 22:16, cleared after 6 h 44 min
• A1 closed B1174 → Grantham · 23 Sept 2026 20:00, cleared after 23 min
• A1 closed B1164 → B6325 · 23 Sept 2026 16:22, cleared after 4 h 29 min
• A1 closed J80 · 22 Sept 2026 23:11, cleared after 2 h 59 min
• A1 closed London Road (A1) → School Lane · 22 Sept 2026 21:01, cleared after 8 h 10 min
• A1 closed · 22 Sept 2026 21:01, cleared after 6 h 47 min

About this page

This page shows what the data sources reported about this event and when, merged from every source that reported it at the same place. It doesn't say what caused it or whether anyone was hurt: no source reports that. Times are UK time. For live alerts, follow @motorways.me on Bluesky.