How do yard limits differ from mainline operation?

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Multiple Choice

How do yard limits differ from mainline operation?

Explanation:
This question is asking you to compare how yard operations differ from mainline operations in terms of speed, control, and signaling. Yard movements are designed for switching and assembling cars within a yard, so they happen at very low speeds and under tight, controlled conditions. This environment uses yard-specific protections and signals to manage the close-quarters shunting work. On the mainline, trains must follow standard signals and interlocking rules, and they operate at higher speeds with protections covering longer, more open track sections. So the best description is that yard limits cover low-speed, controlled movements in yards, while the mainline requires adherence to signals and higher speeds. The other statements don’t match how yards and mainlines are actually governed—signaling and speed rules differ in a way that makes the yard intentionally slower and more restricted, while the mainline emphasizes signal compliance and higher-speed operation.

This question is asking you to compare how yard operations differ from mainline operations in terms of speed, control, and signaling. Yard movements are designed for switching and assembling cars within a yard, so they happen at very low speeds and under tight, controlled conditions. This environment uses yard-specific protections and signals to manage the close-quarters shunting work. On the mainline, trains must follow standard signals and interlocking rules, and they operate at higher speeds with protections covering longer, more open track sections. So the best description is that yard limits cover low-speed, controlled movements in yards, while the mainline requires adherence to signals and higher speeds. The other statements don’t match how yards and mainlines are actually governed—signaling and speed rules differ in a way that makes the yard intentionally slower and more restricted, while the mainline emphasizes signal compliance and higher-speed operation.

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