The victim has been identified as Kenneth L. Aleshire, 20, of Seaford, Delaware.
Aleshire was struck around 5:00 a.m. on Route 40 (Pulaski Highway) eastbound near La Grange Avenue.
The driver of the SUV, Riki L. Newman, 31, Bear, DE, stopped at the scene.
Newman told investigators the victim simply stepped out in front of her SUV.
Aleshire's body was turned over to the medical examiner's office where an autopsy will be performed to determine the exact cause of death.
The accident remains under investigation.