What is the speed limit enforced by ATC in Yard mode?

In Yard mode, the speed limit enforced by the Automatic Train Control (ATC) system is set at 12 mph. This speed is specifically established to ensure the safety and efficiency of train operations within confined yard spaces where various activities such as coupling, uncoupling, and maintenance are performed. The reduced speed limit allows for more precise maneuvering around static objects, other trains, and personnel working in close proximity.

The ATC system is designed to automatically regulate train speeds under specific conditions to enhance safety. In a yard environment, the likelihood of unexpected obstructions and interactions with other rail vehicles is significantly higher than on mainline tracks. Therefore, the 12 mph limit serves as a critical parameter to minimize the risk of accidents and ensure that engineers can react promptly to changing situations.

It's important to be aware that operational guidelines can vary by location or specific regulations dictated by the transit authority, but the 12 mph stipulation in Yard mode is a standardized practice consistent with safety protocols in train operations.