What action should you take when you encounter a red sign displayed with no corresponding GBO item?

• A. Stop and contact RTC for instructions
• B. Continue at normal speed
• C. Ignore the sign
• D. Proceed with caution

Answer: (A)

When you see a red sign with no matching GBO item, the action is to stop and get instructions from the Rail Traffic Controller. Red signs signal you must halt, but without a corresponding GBO entry there’s no standard instruction to follow. The RTC can provide explicit authorization or instructions for that specific situation, ensuring you don’t enter a restricted or unsafe area.

Moving ahead at normal speed or ignoring the sign isn’t appropriate because there’s no approved directive to proceed. Proceeding with caution isn’t enough when there’s no clear instruction from the RTC. After stopping in a safe location, contact the RTC, state your location and the sign you’ve encountered, and wait for clear directions before moving.