The northbound lanes are closed around junction nine for Redboune to junction eight for Hemel Hempstead. Highways England has warned drivers to expect delays following an “overturned car from a multi-vehicle collision”. The lanes three and four are still closed after traffic was held for an hour after the 6am crash.
Highways England has advised people driving to London to consider changing their route to avoid the M1 southbound.
There is also queueing traffic due to people slowing down to look at the accident around Hemel Hempstead and Rebbourn.
Further up the M1 at Luton North, all lanes have been stopped due to recovery work following a stalled vehicle.
Highways England tweeted: “J11A – J11 southbound, short hold of traffic to clear a stranded car in outside lane. Aim to have you moving as soon as we can.”
More to follow…