A driver was cut free from his van and airlifted to hospital after a collision with a tractor and trailer on a major road on Teesside.
The crash happened on the A19 northbound between Wolviston and Elwick early on Wednesday.
The male van driver was taken to hospital by helicopter with serious injuries and is in a critical condition.
The northbound carriageway was closed with traffic diverted via the A689.
Cleveland Police are appealing for any witnesses.