Generic image of police lights. MILFORD, Del. - Authorities say a Chester County man died early Sunday morning when his vehicle slammed into a traffic light post in Milford, Delaware.According to police, the fatal accident happened on the northbound side of Dupont Boulevard around 6:30 a.m.Investigators say a 19-year-old man driving a 2006 Ford 500 was approaching Buccaneer Boulevard when he skidded off the road and slammed into a traffic light post.