A multi-vehicle crash involving a tractor-trailer seriously injured a pedestrian on Interstate 81. The Pennsylvania state police were called to the scene in Dauphin County at 9:18 a.m. on Sunday. According to state police, troopers were at the scene investigating a crash when another vehicle hit the vehicles involved in that crash.They say a pedestrian was struck and suffered a major injury. The pedestrian has been identified as 60-year-old John F. Bosworth of Oriskany Falls, New York. Bosworth was transported to Hershey Medical Center. The investigating trooper and another driver in the crash were nearly struck by the vehicle but we able to drive out of the way. The accident shut down traffic in the southbound lanes of I-81 in East Hanover Township for three hours.