Troopers say they're not sure why 51-year-old Robert Craig of Killingworth fell out of his 2006 Dodge Charger late Tuesday morning in Darien near Exit 10. Police say Craig was treated for minor injuries at Stamford Hospital.
State police say Craig fell onto the highway but wasn't struck by any vehicles. They say other motorists stopped to help him and get him to safety.
Troopers say the car continued down the highway before striking a light pole and metal guardrail on the right shoulder.
The accident remains under investigation.