Which rule governs the communication of restrictions and required actions that affect the safe operation of their train to allow the engineer to take proper action?

• A. Lifebook T-11
• B. USOR 104
• C. Lifebook T-2
• D. Lifebook T-6

Answer: (B)

Communicating restrictions and required actions clearly is essential for safe train operation. This rule ensures that any condition that could affect how the train is run—such as a new or changing speed restriction, a track condition, a signal limitation, or a mandatory action—is conveyed to the engineer in a clear, timely, and unambiguous way. It designates who can issue these instructions and how they should be delivered so the engineer can understand exactly what is required and act accordingly. The goal is to prevent miscommunication and give the engineer the information needed to slow, stop, accelerate, or adjust train handling safely. In practice, the person responsible for movement instruction communicates the precise restriction or action to the engineer, who then applies it to the operation and proceeds with the correct actions.