Struck-by hazards are one of the Occupational Safety and Health Administration's (OSHA's) fatal four incidents. Have you ever experienced or heard of an accident involving moving equipment? If you have, describe (without any specifics of who, when, or where) the general causes of the accident. What could be some ways to avoid these types of accidents? If this has happened in your workplace, would an internal traffic control plan have helped? How would you have set this up? If you have not heard of any workplace incidents, think of a time when you were doing yardwork or housework, and apply it to these questions. Have you ever been struck by a rock from a lawnmower or used a saw that kicked something back at you because you did not have the guard on it?