Thames Valley Police is currently at the scene of a single vehicle collision on the M40 in Oxfordshire.
A lorry overturned and spilled its load on the northbound carriageway between J9 and J10. The lorry driver's injuries are not life-threatening.
One lane has now re-opened to help ease congestion.
One lane is closed on the Oxfordshire M40 Southbound due to an accident between junction 7 for the A40 / A329 (Thame) and junction 6 for the B4009 (Watlington).