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A man has been cut free from a Land Rover that overturned on the M20 this afternoon.
The vehicle flipped on the London-bound carriageway near the Roundhill Tunnel close to Folkestone at about 12.50pm.
Police said the road was shut in both directions while an air ambulance landed.
The road re-opened after about an hour, but one lane remained coned off for investigation work - leading to delays for motorists.
A Kent Police spokesman said one person with neck injuries had been trapped in the Land Rover Discovery.
Three other men, who were passengers, were described as having minor injuries.