The A436 is closed in both directions due to an accident at the A435 Cirencester Road junction.
Congestion is back to the A417 (Air Balloon Roundabout).
Police hope the road will be open by around 6.30pm.
More top news
A fraudster from Cirencester has today been found guilty of posing as a barrister to dupe unsuspecting victims out of money.
Bob has the forecast for Devon, Cornwall, Dorset and Somerset.
Bob has the forecast for Bristol, Wiltshire, Somerset, Dorset and Gloucestershire.