A 'very serious' two-car crash has closed the A354 Weymouth Relief Road in both directions.
Traffic is very slow between the A353 Jurassic roundabout in Weymouth and the A35 football ground roundabout in Dorchester.
Dorset Police were called at 11.41am today to reports of the incident.
A spokesman for Dorset Police said: "The A354 Weymouth Relief Road has been closed following a very serious RTC.
"Emergency services are at the scene. Closures are in place between the Jurassic and Stadium roundabouts. The road is expected to be closed for some time.
"Please seek alternative routes."
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