The air ambulance has attended a road crash on the A120 in north Essex.
Fire crews were called to the road near Little Bromley at about 8.15am.
A woman was trapped in one of the vehicles on the Colchester-bound road.
Crews used cutting equipment to remove the roof of the car and release her. She was in the care of medics by about 9.25am.
The road, between Little Bromley and Great Bentley, is known as an accident blackspot.
Traffic had began queuing on the road which had become blocked because of the crash at the junction near the A133.
A spokesman for the East of England Ambulance Service said: “We were called at 8.14am dispatching a duty manager, two ambulances and the air ambulance.
“One casualty suffered a serious chest injury but is in a stable condition, and a second patient had minor injuries.
“Both were conveyed to Colchester General Hospital by land.”
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