What does a red banner on the PTC screen indicate?

What does a red banner on the PTC screen indicate?

• A. System fault
• B. Enforcement braking in process
• C. Power restored
• D. Speed limit reached

Answer: (B)

A red banner means enforcement braking is in progress. In Positive Train Control, the system continuously checks your speed and track restrictions, and if you’re approaching a limit or a signal that you must not pass, it automatically applies braking to bring you back into compliance. This banner signals that braking is actively being applied by the system, not that there’s a fault or merely that a speed limit has been reached. If braking ends once you’re at a compliant speed, the banner will no longer be active.

A red banner means enforcement braking is in progress. In Positive Train Control, the system continuously checks your speed and track restrictions, and if you’re approaching a limit or a signal that you must not pass, it automatically applies braking to bring you back into compliance. This banner signals that braking is actively being applied by the system, not that there’s a fault or merely that a speed limit has been reached. If braking ends once you’re at a compliant speed, the banner will no longer be active.