What type of track is used for making up trains, storing cars, and requires movements to operate at a restricted speed?

Yard track is specifically designed for the purposes of making up trains, storing railcars, and organizing freight. These tracks are integral for operations within rail yards where trains are assembled, disassembled, or held for various reasons such as maintenance or scheduling. Yard tracks are typically subject to restricted speed limits to ensure the safety of both personnel and equipment, as operations within the yard can involve a variety of movements, including shunting and switching.

Main tracks, on the other hand, are primarily used for the movement of trains at higher speeds and connect different destinations, making them less suitable for assembly and storage. Inaccessible tracks are reserved or unsafe for general use, while controlled tracks refer to sections of track managed by specific rules or signals but may not encompass the unique functions of storing and assembling trains found on yard tracks. Thus, the nature and operational use of yard tracks distinctly align with the question's requirements.