RoadSafe Traffic Systems, Inc., is a road construction company that provides traffic control, pavement marking, and pavement striping services. On November 14, 2017, a RoadSafe employee was struck and killed by a company vehicle while installing raised reflectors on a highway near Devers, Texas. Following the incident, the Occupational Safety and Health Administration conducted an inspection and issued RoadSafe a citation alleging a serious violation of the Occupational Safety and Health Act’s general duty clause, 29 U.S.C. § 654(a)(1), for exposing employees working from the back of a moving vehicle to fall hazards. Following a hearing, Administrative Law Judge Sharon D. Calhoun affirmed the violation and assessed the proposed $12,675 penalty. For the following reasons, we affirm.