Just before 8:30 a.m. this morning, California Highway Patrol officers were called out to Highway 59 and Reilly Road.
Officers found a man in his mid 20's to 30's laying on the roadway.
Investigators say the man ran into the road and a semi-truck managed to swerve past him.
But a Honda Civic directly behind the semi hit the man.
The driver of the Civic is cooperating with the investigation.
The man was air-lifted to a Modesto hospital and is in critical condition.