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.
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Parents across the West are preparing to keep their children home from school this morning as part of unofficial strike action.
The agricultural event is now in its 157th year and although there was heavy rain forecast, it didn't deter the crowds.
In true Bank Holiday style we will see some rain for a time today. However, the rest of the week is looking drier, brighter and warmer.