Loaded Auto-Rack cars must not be placed in a train behind which type of cars?

Loaded Auto-Rack cars must not be placed in a train behind which type of cars?

• A. Tank cars loaded with hazardous liquids
• B. Open top cars loaded with stone, coal, or gravel
• C. Open top cars loaded with sand
• D. Boxcars with cargo doors closed

Answer: (B)

Loaded auto-rack cars must be kept clear of open-top bulk-cargo cars because loose material can shed from those loads and land on or around the auto-rack as the train moves. Stone, coal, or gravel can spill or blow into the car’s gaps, doors, or undercarriage, potentially causing damage to the rack, its wheels and brakes, or the vehicles inside, and it can create unsafe unloading conditions at destinations. The other scenarios involve different hazards or conditions that are not specified by this rule as the primary risk. Boxcars with closed doors don’t expose loose material, while tank cars carrying hazardous liquids or open-top cars with sand don’t present the same type of debris risk that open-top bulk loads of stone, coal, or gravel do in this context.

Loaded auto-rack cars must be kept clear of open-top bulk-cargo cars because loose material can shed from those loads and land on or around the auto-rack as the train moves. Stone, coal, or gravel can spill or blow into the car’s gaps, doors, or undercarriage, potentially causing damage to the rack, its wheels and brakes, or the vehicles inside, and it can create unsafe unloading conditions at destinations. The other scenarios involve different hazards or conditions that are not specified by this rule as the primary risk. Boxcars with closed doors don’t expose loose material, while tank cars carrying hazardous liquids or open-top cars with sand don’t present the same type of debris risk that open-top bulk loads of stone, coal, or gravel do in this context.