Two train employees were injured in Tennessee when a train hit a semi-truck that was sitting on the tracks waiting for a traffic light to change, causing three locomotives and 10 railroad cars to derail. The collision left “a disastrous mess” Tuesday in Collegedale, a suburb of Chattanooga. The freight train hit a truck carrying a 134-foot concrete truss bridge beam. Two Norfolk Southern Train employees were hospitalized with minor injuries. The truck driver wasn’t hurt.