The Cobb County Medical Examiner's Office on Tuesday identified a motorist killed in a fiery crash on I-575 last week as a 33-year-old Blue Ridge man.

Joseph Guy Cooper was the driver of a blue 2002 Ford Expedition early Friday morning that plunged off an overpass, crashed into a bridge retaining wall on the roadway below and burst into flames, authorities said. The wreck happened at the I-575 bridge over Hawkins Store Road in Kennesaw.

Cobb police spokesman Michael Bowman said information from the scene indicated the driver, heading southbound on the interstate, failed to maintain the lane and traveled through the grass median, then over the edge of the overpass. Cooper was pronounced dead at the scene.

—Dispatch editor Angel K. Brooks contributed to this article.