The scheme authorises the Secretary of State to construct a new slip road connecting an improved roundabout on the A43 Trunk Road near Cherwell Valley Motorway Service Area (known as Cherwell Roundabout) with the existing slip road leading from the service area to the southbound carriageway of the M40 at Junction 10. The slip road leading from the A43 Padbury Roundabout to the southbound carriageway of the M40 would then be closed. A new link road would also be provided from the service area exit road to the new southbound entry slip road. It is part of an improvement scheme designed to reduce congestion at this motorway junction.