Who is authorized to remove a blue signal?

• A. The dispatcher
• B. Only a person of the same group or craft that displayed the signals may remove it, after all the workmen are clear
• C. A supervisor
• D. A safety officer

Answer: (B)

Blue signal protection is a safety measure that protects workers on or near the track. When this signal is in place, it can only be removed by a person from the same group or craft that displayed it, and only after all workmen have cleared the area. This ensures the person taking down the protection is directly aware of what work was being done and confirms that no one remains in the danger zone before the track is considered safe for movement. Dispatchers, supervisors, or safety officers aren’t the ones who should remove it because they did not place the protection and may not have the same on-site awareness of who is still working or where they are. The rule prevents premature clearance and keeps the crew protected.