A temporary traffic order affecting roads near Kassam Stadium has been introduced by Oxfordshire County Council.
The measures, which came into force on October 26, may remain in force for up to 18 months and apply on football match days and authorised event days.
The order covers the Grenoble Road area between Robert Robinson Avenue and Guelder Road, supporting Oxford United Football Club’s traffic management plan.
On relevant days, traffic circulation at the four Grenoble Road roundabouts serving the stadium area may be restricted to help vehicles travel in both directions as supporters arrive and depart.
Waiting, loading and unloading are prohibited throughout Grenoble Road and at junctions with side roads.
Parking areas on the north side are also subject to suspension.
Drivers unable to use closed junctions will be directed to the roundabouts and returned via the opposite carriageway.
Additional Grenoble Road junctions could be closed as required, while lane restrictions on local roads may permit traffic to travel in one direction only.
During major operational or emergency situations, the full length of Grenoble Road may close.
Alternative routes are available via the A4074 Henley Road, A4142 Eastern By-Pass and B480 Watlington Road, and in the reverse direction.
Road signs will indicate when the restrictions apply.
Exemptions cover emergency services, traffic management operations and access to premises that can only be reached from closed sections of road.