A system of tracks, other than main tracks, used for making up trains, storing cars and other purposes. All movements are subject to prescribed signals, rules and special instructions.

• A. Camp Car
• B. Yard Limits
• C. Two or More Tracks
• D. Yard

Answer: (D)

This describes a yard. A yard is a system of tracks, separate from the main lines, used to make up trains, store cars, and perform other switching tasks. Movements in a yard are controlled by prescribed signals, rules, and any yard-specific instructions, reflecting the organized, busy activity of assembling and handling cars.

The other terms don’t fit as the defined facility: a camp car is a type of rail equipment, not the track system; yard limits refer to the boundary within which yard operations are governed rather than the collection of tracks itself; “two or more tracks” is a generic description, not the standard railroad term for the facility.