Motorists on the M1 in Northamptonshire are facing long delays this afternoon after two lanes of the motorway were closed.
There is queuing traffic on the northbound carriageway from junction 15 to junction 17.
Traffic is also slow in the other direction due to motorists slowing down to have a look at what is happening on the other side of the road.
Earlier today a lorry overturned near junction 15. This vehicle has now been recovered to the hard shoulder.