
All lanes have now re-opened and delays are clearing on the M1 Southbound in Milton Keynes following an accident.
The lane closure was in force between J14 at Milton Keynes and J13 at Bedford/Milton Keynes South.
Highways officials have not yet confirmed the number of vehicles involved in the collision.
Traffic was queuing in the affected area back to Newport Pagnell Services.
50mph speed restrictions and narrow lanes are currently in place due to the ongoing smart motorway upgrade.