Before working between, under, or at the end of equipment with a locomotive attached, what radio message must the ground employee send?

• A. "Going in - between ( required I.D. ) ."
• B. "All clear"
• C. "Proceed when able"
• D. "Going out - between ( required I.D. ) ."

Answer: (A)

When you’re about to work in the space between equipment that has a locomotive attached, you must notify the locomotive crew before you enter. The radio call should be “Going in – between (required I.D.).” This message clearly communicates that you are entering the protected area between the pieces of equipment, and it includes your identification so the crew knows who is entering. That lets the crew coordinate and ensure movements won’t endanger you.

The other phrases don’t fulfill that entry-notification purpose. Saying “All clear” would just imply the area is safe, not that someone is entering. “Proceed when able” is a general instruction about movement, not a specific entry notice. “Going out – between” is for exiting the space, not entering. The combination of going in, the location “between,” and your required ID is the precise, standardized way to announce your entry.