In Cromwell, Connecticut, police were called to south I-91 just after 8 p.m. after a "small, white Honda sedan" veered onto the shoulder and crashed into a parked car, Connecticut State Police said.
The driver, a man from Woburn, Massachusetts, had stepped out of the vehicle when he was hit. The other people inside his car — all from Woburn — were not hurt.
The second vehicle sped away and did not stop to help or contact responders for aid, police said.
Troopers ask anyone with information on the crash to contact investigators at 860-534-1000.
Authorities did not release any information on the man's condition on Saturday.
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