Part of the A30 is currently closed to allow the air ambulance to land following a serious collision.
Two vehicles are involved in the crash, which has taken place at the B3301 Carwin Rise, near Hayle.
The A30 at Loggans is blocked in the westbound direction, with traffic queuing to Roseworthy.
An air ambulance is currently at the scene and the road is expected to be closed for some time.
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