What function do switches serve in rail yards?

Switches play a crucial role in rail yards by redirecting trains from one track to another. This function is vital for managing the flow of train traffic, allowing for the organization and sorting of railcars. When a switch is activated, it changes the alignment of the tracks, directing locomotives and railcars to their designated routes. This capability is essential for efficient operations in rail yards, where multiple tracks are often in use simultaneously for various purposes such as loading, unloading, and staging of trains.

The other functions mentioned are not performed by switches. While securing railcars is important, it involves different equipment such as couplers and brake systems. Maintaining track cleanliness is related to regular maintenance practices carried out by track crews. Providing power to signals involves electrical systems that monitor train movements and ensure safety, distinct from the mechanical function of switches.