Pedestrian killed while crossing I-75 in Marietta

A 44-year-old man died Thursday morning while trying to cross I-75 South in Marietta, police said.

The man, who has not been identified, was crossing near the entrance ramp to South Marietta Parkway around 2:30 a.m. when he was struck and killed by a tractor-trailer, according to Marietta police. The truck driver stayed at the scene and is cooperating with the investigation.

It was not clear why the man was walking on the interstate. His name is being withheld pending family notification.