What should be done to prevent an accident-prone railcar on its roof from moving during rescue operations?

To prevent an accident-prone railcar on its roof from moving during rescue operations, securing it with webbing or chains is the most effective method. This technique provides a stable anchoring system that can restrain the railcar, reducing the risk of it shifting or rolling during the rescue process. Proper tie-off techniques help to maintain control over the vehicle, allowing rescuers to safely perform their tasks while mitigating hazards.

Using heavy construction equipment, while it may seem a viable option, could introduce additional complications or risks, such as causing further instability to the railcar. Filling the car with water for stabilization is not practical or effective; it may shift the center of gravity and create more hazards. Draining fuel might help to minimize fire hazards, but it does not directly prevent movement of the railcar. Therefore, securing the railcar with webbing or chains is recognized as the most reliable method to ensure safety during rescue operations.