What is the system of tracks used for making up trains and storing cars, other than main tracks and sidings?

What is the system of tracks used for making up trains and storing cars, other than main tracks and sidings?

• A. Terminal
• B. Yard
• C. Interchange
• D. Roundhouse

Answer: (B)

The main idea is yard operations—the network of tracks used to make up trains and store cars. A yard is a dedicated area with many parallel and cross tracks where cars are brought in, sorted by destination, and then assembled into a complete train on a departure track. This setup lets crews regroup and organize cars efficiently without using the mainline tracks or any sidings. The other options don’t fit as well: a terminal is a broader facility for handling traffic, an interchange is where cars move between different railroads, and a roundhouse is a building for servicing locomotives around a turntable.

The main idea is yard operations—the network of tracks used to make up trains and store cars. A yard is a dedicated area with many parallel and cross tracks where cars are brought in, sorted by destination, and then assembled into a complete train on a departure track. This setup lets crews regroup and organize cars efficiently without using the mainline tracks or any sidings. The other options don’t fit as well: a terminal is a broader facility for handling traffic, an interchange is where cars move between different railroads, and a roundhouse is a building for servicing locomotives around a turntable.