A serious crash between a van and a stationary lorry closed part of the northbound M1 in Buckinghamshire.
Thames Valley Police said on Twitter that the “serious-injury collision” occurred at about 07:00 BST.
The motorway was closed between junction 13, for Milton Keynes south and Bedford, and junction 14, for Milton Keynes and Newport Pagnell.
It has since reopened and police have asked witnesses and anyone with dashcam footage to come forward.
Highways England later said its planned road closure between junction 14 and 15 northbound had now been cancelled.
(This is a smart motorways section)
BBC article here