If the cab signal conforms to the fixed signal upon entering the block, the ______________ signal will govern?

If the cab signal conforms to the fixed signal upon entering the block, the ______________ signal will govern?

• A. Cab signal
• B. Home signal
• C. Fixed signal
• D. Dispatcher signal

Answer: (C)

In cab signaling, the fixed signal at the block entrance is the governing authority. The in-cab cab signal simply reflects what the fixed signal shows. If the cab signal matches the fixed signal as you enter the block, the fixed signal governs your movement. This setup keeps a single, clear authority for safeties and speed, with the cab display acting as a corroborating indicator rather than the source of control.

In cab signaling, the fixed signal at the block entrance is the governing authority. The in-cab cab signal simply reflects what the fixed signal shows. If the cab signal matches the fixed signal as you enter the block, the fixed signal governs your movement. This setup keeps a single, clear authority for safeties and speed, with the cab display acting as a corroborating indicator rather than the source of control.