Delays are expected this morning as a lane on the M1 exit slip road has been closed.
One lane has been closed on the M1 northbound exit slip road at J13 (A421 Milton Keynes).
The closure is due to a broken down vehicle.
Drivers are being warned to approach with caution.
National Highways say Traffic Officers are on their way to the area.
UPDATE 08:09- All lanes have now reopened.