What is the function of yard limits (YL) in railway operations?

Yard limits (YL) serve a crucial function in railway operations by defining specific areas where normal train operation rules may change. Primarily, yard limits are established to enhance safety and facilitate efficient operations within designated zones, particularly near railroad yards where trains are assembled or disassembled.

This function is significant because it allows trains to operate under specific conditions that may require more restrictive or controlled movements compared to mainline operations. For instance, within yard limits, trains may need to reduce speed, be prepared for unexpected stops, or yield to other movements frequently occurring in and around the yard environment.

Other options are not applicable since yard limits are not specifically about passenger services, maintenance zones, or loading procedures, which are governed by different sets of regulations and practices. Yard limits are essential for managing train movements safely and efficiently within a confined operational area, ensuring that all personnel understand the rules and procedures in effect.