This safety alert is directed towards organisations in the waste and recycling sector that operate vehicles equipped with hydraulically operated rear doors, hatches, or body sections. It comes in response to a tragic incident involving a fatal accident where an individual was working beneath the top-hinged hydraulically powered rear door of a road sweeper. The failure of the door mechanism resulted in it abruptly closing, leading to fatal crush injuries. The content of this alert is also relevant to other waste vehicles featuring hydraulically operated components that pose a similar risk. Examples include the top-hinged rear door of a walking-floor bulk waste trailer and the raising rear body section found on most refuse collection vehicles (RCVs) and similar vehicles.