There are long delays on the A31 with traffic queued back to Poulner Hill.
It is believed a crash has taken place on the westbound carriageway although emergency services were not called to the scene.
Travel time is believed to be around 30 minutes from Poulner Hill to Ringwood.
A broken down vehicle on the A31 at Ferndown is also causing delays.
Dorset Police were called at around 8.30am to a broken down Ford Transit van at Palmersford Roundabout, West Moors.
They closed one lane while the vehicle was recovered.
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