Final answer:
Loaded Auto-Rack cars, which are used to transport vehicles, should not be placed behind tank cars with hazardous materials. This is to prevent accidents and ensure safety in train operations.
Step-by-step explanation:
Loaded Auto-Rack cars must not be placed in a train behind tank cars containing hazardous materials. This is a safety precaution to prevent potential damage and hazardous material spills in the event of a derailment. Auto-Rack cars are specialized railcars designed to transport automobiles and are typically constructed with either two or three decks to maximize space.
When operating a train, it's crucial to follow proper train make-up protocols to ensure the safety of the cargo and to minimize the risk of accidents. Placing heavy or shift-prone loads like vehicles near tank cars carrying flammable or dangerous substances could be catastrophic in the event of a collision or derailment. Therefore, those responsible for train assembly must adhere to strict guidelines regarding the placement of different types of railcars.