Drivers are facing long queues on the M1 after the motorway closed near Milton Keynes due to a collision.
The M1 in Bedfordshire is closed northbound between J12 near Flitwick and J13 near Milton Keynes as emergency services work at the scene.
Road cameras show long queues building on the northbound carriageway.
National Highways said there are delays of up to 30 minutes on approach to the affected stretch of road.
Drivers advised to follow a diversion route
National Highways has advised road users to follow the Hollow Diamond diversion symbol on local road signs.
Drivers have been told to
- Continue on the A421 Bedford Road and re-join the M1 at Junction 13.
- From the M1, J12 exit slip road, go onto the A5120 northeast to Westoning.
- Continue on the A5120, through Westoning to the A5120/Steppingley Road roundabout.
- At the A5120/Steppingley Road roundabout take the second exit onto Steppingley Road. Continue on Steppingley Road past Flitwick Railway Station and merge onto Fordfield Road.
- Continue on Fordfield Road to the A507/Fordfield Road Crossroads. At the crossroads keep right onto the A507 Ridgemont by-pass.
- Continue straight over Station Road and Salford Road roundabouts and merge onto the A421 Bedford Road.
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