A serious crash closed part of Route 15 south in North Haven on Thursday night.
State police identified the driver involved as 46-year-old Paul Kus of Sandy Hook.
He remained in serious condition on Friday morning.
Troopers said the road was closed at Exit 63 just before 8 p.m. on Thursday.
Kus's car was the only one involved.
He was taken to the Connecticut Burn Center at Bridgeport Hospital.
Troopers said the car veered off the road and hit a metal beam guardrail in the center median. It then continued to sideswipe the guardrail for about 80 feet before crossing both lanes to the right and coming to a final stop in the grass on the right shoulder.
The car then caught fire.
Anyone with information about what happened is asked to contact state police at 203-393-4200.
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