What is the maximum speed limit in Yard mode according to ATC restrictions?

The maximum speed limit in Yard mode according to Automatic Train Control (ATC) restrictions is 12 mph. This limit is established to ensure safety within the confines of railway yards, where operations often involve switching, loading, and unloading activities that require greater caution. The 12 mph limit allows for adequate reaction time for engineers and maintains control over the movements of trains and equipment, minimizing the risk of collisions or accidents in an area where various rail operations take place in close proximity.

Understanding this speed limit is crucial for train engineers as it plays a vital role in operational safety and efficiency when navigating through yards, where various hazards can be present. The other options represent speeds that exceed the established safety protocols for Yard mode operations, which necessitate stricter limitations to ensure the safety of personnel and equipment in those environments.