In a Cab Red Zone, which movements are permitted?

• A. All movements are allowed.
• B. Only work-related movements are allowed.
• C. Only movement approved by the yardmaster.
• D. No movements are allowed under any circumstances.

Answer: (B)

In a Cab Red Zone, the purpose is to limit movement to only what is necessary to perform the assigned work. This zone is a safety boundary where stray or non-essential movements could put workers at risk from moving equipment, switches, or other yard operations. So the rule is that only work-related movements are allowed—actions that are directly tied to completing the task at hand.

Why the other ideas don’t fit: allowing all movements would remove the safety restrictions the red zone is designed to enforce. Requiring yardmaster approval for every move adds an extra step but isn’t the fundamental rule being tested here, and it could slow necessary work without changing the risk. Saying no movements are allowed would prevent essential tasks from being done. The key concept is that movement is permitted only when it supports the work being performed.