At what speed may a RCL operate within the limits of an active zone protected by PSP?

The correct answer is 10 mph because it aligns with the safety regulations established for remote control operations within active zones protected by Personnel Safety Protocols (PSP). Operating at this speed ensures that the remote-controlled locomotives can be maneuvered safely while respecting the safety of personnel and equipment in the vicinity.

A speed of 10 mph is typically regarded as a moderate pace that allows for sufficient reaction time to address any unforeseen circumstances or obstacles within the operational area. It prevents excessive risk to workers and equipment while maintaining efficient operational flow.

Higher speeds may introduce greater risk factors and reduce the operator's ability to react promptly to any potential hazards that may arise in an active zone, where worker presence is common. Thus, the recommendation for operating at 10 mph both prioritizes safety and adheres to established protocols.