How many tracks are located in the North yard in Harrison Yard?

The North yard in Harrison Yard is designed with specific operational needs in mind, which dictates the number of tracks present. In this context, four tracks make sense as they allow for efficient movement and organization of rail traffic, enabling flexibility for switching and staging trains without overcrowding.

Having this number ensures that there is enough capacity for operations while still maintaining ease of access and management of the yard. An excessive number of tracks may lead to operational complexities and increased maintenance requirements, which would not be optimal within the constraints of the yard's design. Conversely, fewer tracks could limit operational efficiency. Hence, four tracks strike a balance that supports the layout and functioning of the North yard appropriately.