Which of the following is true regarding the security of freight car and trailer doors and top covers during operation?

• A. Doors and drop bottoms must be closed and fastened; Top covers must be secure in place
• B. Doors may be open if the car is empty
• C. Top covers may be loose if the car is in motion
• D. Doors and drop bottoms can be left unsecured

Answer: (A)

During operation, all doors and drop bottoms must be closed and fastened, and top covers must be secure in place. This prevents cargo from spilling or shifting as the train moves and keeps debris, weather, and wind from entering or causing damage. It also protects workers from unexpected openings and keeps the car’s contents stable under motion.

Doors being left open, even on an empty car, presents a risk of material escaping or the door swinging open due to vibration. Top covers that are loose can come off or flap in the wind, creating hazards and potential injury. Leaving doors and drop bottoms unsecured undermines all of the safety and security aims of rail operation.