Abstract: On November 9, 2009, Employee #1, Employee #2, and a coworker were preparing to conduct a final tension check of a cable barrier system. They arrived at the jobsite, in a company truck, and pulled off the road into the center median. As Employee #1 and Employee #2 exited the truck, they grabbed a calibrator, a device used to check cable tension. Without warning, a Ford F-350 truck hauling a coil of aluminum on a gooseneck trailer swerved left, from the right-hand lane, and into the center median. The truck contacted the cable barrier system, and as it continued to travel south, it struck Employees #1 and #2, who were checking the cable tension. After the truck struck Employees #1 and #2, it continued for 300 feet to 400 feet, before coming to a stop in the center median. Employees #1 and #2 were killed.