Three motorcycle accidents led to the shutdown of Lake Shore Drive earlier today.
One motorcycle lost control and crashed near the 1500 block of North Lake Shore Drive.
That accident closed all southbound lanes, south of North Avenue, for over an hour.
Two other motorcycles were approaching the scene when they hit some debris and slid out of control.
Four people were taken to the hospital with non-life threatening injuries.
Lanes were reopened just after 5 a.m.