There are delays on the A417 in Gloucestershire following an accident involving two vehicles, one of which overturned.
The accident happened at Crickley Hill and the road is closed in both directions between A436 / A417 (Air Balloon Roundabout) and A429 Burford Road.
Police say traffic has been diverted whilst they investigate the incident and a fuel spillage is cleared.
They say the road will hopefully re-open in time for the morning rush hour.
The suggested diversion for southbound traffic is to take the solid circle diversion route via the A429, A40 and A436.
Officers say northbound traffic should follow the solid square symbol diversion route, reverse of southbound.