How are yellow-red flags displayed when the restricted area is close to a terminal?

Yellow-red flags are a crucial safety measure used to indicate a restricted area near a terminal. When these flags are displayed less than two miles before the restricted area, they serve to alert crew members and train operators about the impending restriction. This allows enough time for operators to take appropriate actions, ensuring safety as they approach the terminal.

Displaying the flags within this distance ensures that there is a clear warning well in advance of the operational change, allowing for adequate reaction time. In high-traffic areas like terminals, where the likelihood of interactions between different trains and maintenance activities increases, these flags help in managing the flow and ensuring compliance with safety protocols.

The other choices do not align with the standard safety practices regarding flag display near restricted areas. For instance, displaying flags more than two miles before would be unnecessary for the immediate operational needs at the terminal, and restricted area markers should not be limited to the terminal itself, as they need to effectively communicate the restricted area well before reaching it. Operational guidelines provide the framework, but the specific practice of displaying flags within less than two miles is designed for practical safety measures.