Semi-Truck Slams Into Highway Pile-Up Harrisburg, Pennsylvania — March 5, 2024 A horrifying secondary crash was caught on camera Tuesday on a wet stretch of Interstate 81, as a semi-truck lost control and plowed into an existing pile-up, compounding a scene of highway chaos. The video, filmed from an overpass, shows traffic already snarled from a multi-vehicle wreck on the right shoulder. As onlookers watch, a white tractor-trailer approaches the scene at speed. The truck suddenly begins to jack