Drivers are being forced to go slow following a four-vehicle crash on the M40 near Bicester.
The accident happened about 8am on the southbound carriageway, between junction 10 at Brackley and junction nine at Bicester.
One lane is blocked and there is queueing traffic tailing back to junction 11 at Banbury.
Four vehicles in lane three were involved in the crash near junction 10, and Highways Agency staff are now at the scene.
No-one from South Central Ambulance was available for comment.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here