If the cab signal, speed control, or automatic train stop fails in 554 territory, the Engineer must not exceed what Speed?

If the cab signal, speed control, or automatic train stop fails in 554 territory, the Engineer must not exceed what Speed?

• A. 20 MPH
• B. 40 MPH
• C. 60 MPH
• D. 80 MPH

Answer: (B)

When a vital protection system is out—the cab signal, speed control, or automatic train stop—you’re operating without automatic safeguards that enforce safe speed. In 554 territory, the rule is to limit your speed to 40 mph to maintain enough margin to observe signals, respond to any changing conditions, and stop if necessary without relying on automatic protection. This speed is chosen as a balance between keeping trains moving and ensuring safety without automation. You still follow any posted restrictions or signals. If a cab signal or protection system comes back online or the dispatcher provides new instructions, you can adjust accordingly. Faster speeds would not be safe under a system failure, while a much slower speed isn’t required than this 40 mph limit in this territory.

When a vital protection system is out—the cab signal, speed control, or automatic train stop—you’re operating without automatic safeguards that enforce safe speed. In 554 territory, the rule is to limit your speed to 40 mph to maintain enough margin to observe signals, respond to any changing conditions, and stop if necessary without relying on automatic protection. This speed is chosen as a balance between keeping trains moving and ensuring safety without automation.

You still follow any posted restrictions or signals. If a cab signal or protection system comes back online or the dispatcher provides new instructions, you can adjust accordingly. Faster speeds would not be safe under a system failure, while a much slower speed isn’t required than this 40 mph limit in this territory.