The M1 has now re-opened after an early-morning crash involving several lorries which has left one man with serious injuries.
Four lorries were involved in the collision which happened between junctions 20 and 21, near Leicester, at 3.20am today.
Leicestershire police says a 47-year-old man was taken to the University Hospitals of Coventry and Warwickshire for treatment to his injuries.
His condition is described as serious.
There are no reports of anyone else having been injured.
Both sides of the motorway were initially closed between junctions 19 and 21 following the incident on the northbound carriageway.
Traffic was diverted off the M1 at junction 19 to rejoin at junction 21, via the M6 and M69.
Highways England tweeted at 12.27pm that the northbound carriageway was now fully re-opened and thanked motorists for their patience.
Deputy chief constable Rob Nixon also took to Twitter to pay tribute to the work of his officers dealing with the incident, as well as their colleagues from East Midlands Ambulance Service and Leicestershire Fire and Rescue Service.
WHAT WE KNOW SO FAR:
10:15: Highways England says recovery work is underway but warns of an extensive clean up operation.
11:16: Highways England confirm recovery of the vehicles is now complete and they hope to reopen the carriage way soon.
11:38: M1 Northbound remains closed between junctions 19 and 21 as final clean up work continues. Traffic through diversion is flowing well.
12:28: Highways England confirm the northbound M1 carriage way is now open between junctions 19 and 21.