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
George Ford booted 24 points as Bath kept the pressure on Northampton at the top of the Premiership with a 39-16 win at rivals Gloucester.
West Country neighbours meet for first time this season at Kingsholm in Premiership.
The funeral of a mother and newborn baby found dead after going missing from a maternity hospital took place today.