The Ohio State Highway Patrol said an O-DOT worker was killed this morning on Interstate 71 northbound in Delaware. Lee Rizor, 27, of Mt. Gilead, was operating a backhoe on the right berm when a tractor trailer drove off the right side of the roadway striking the backhoe. The commercial vehicle flipped over and caught fire. Rizor was pronounced dead at the scene. The tractor trailer driver, Dwayne Allen Hill Sr., 59, of Ashland, Va., was taken to the Wexner Medical Center at Ohio State University in critical condition. The crash is under investigation.