All southbound lanes of Lake Shore Drive were temporarily blocked from Hollywood all the way down to Belmont after a fatal crash Thursday afternoon.
According to Chicago police, an 80-year-old man was driving southbound on the drive when he suffered an unknown medical emergency.
The man became unresponsive and then crashed his vehicle into a guard rail, causing it to spin out and block southbound traffic.
The man was pronounced dead at the scene, and the roadway was closed to allow Chicago police to investigate the crash and clean up damage at the scene.
Traffic is being allowed to re-enter the roadway, but some closures are still possible.