The A35 was partially blocked due to an overturned caravan.
The A35 Dorchester Road westbound was blocked but has since reopened.
The caravan overturned near Litton Lane.
The road was closed for a short period to allow the recovery of the caravan.
A spokesman for Dorset Police said they were called a 2.24pm to reports that a caravan had overturned on the A35.
There are no injuries.
Police have also contacted the highways authority because of possible damage to the road.
Traffic remains slow in the area.
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