One man was killed early Tuesday, when two cars and a semi-trailer truck collided on the Tri-State Tollway. Illinois State Police said a car crashed into the back of a semi in the northbound lanes of the Tri-=State, just south of the Reagan Memorial Tollway. A second car crashed into the back of the first. One man was killed in the crash. At least three lanes of the northbound Tri-State were closed while police investigated. Traffic was getting by on the far left lane and left shoulder.