All lanes reopened on northbound carriageway
The northbound carriageway has been reopened,
Traffic is now set to 60mph while the situation is resolved.
Traffic management system Inrix states:
Queueing traffic due to accident, now on the hard shoulder on M1 Northbound between J8 A414 (Hemel Hempstead) and J9 A5183 ( Redbourn ). Congestion to J6 (North Watford).
All lanes have been re-opened. Matrix sign set to 60 mph. All lanes are now back open.