What device is required to pass a red absolute signal at an Automatic Interlocking when approaching after a distant Approach signal?

• A. A whistle from the engineer
• B. A handheld lantern
• C. The control panel
• D. The handbrake lever

Answer: (C)

Passing a red absolute signal at an Automatic Interlocking requires explicit permission obtained through the interlocking’s control panel. The distant Approach signal tells you to prepare to stop, but moves past a red at danger are not allowed without authorization. The control panel is the device that the engineer uses to communicate with the interlocking, set the route, and receive clearance to proceed (often with any required speed restrictions). It ensures the movement is safe and properly logged.

Other options don’t provide authorization: a whistle is for warning, not for authorizing passing a stop signal; a handheld lantern is a manual signaling tool not used to grant passage; and the handbrake lever is for braking, not signaling or permission.