Which safety features can cause a penalty brake application?

Which safety features can cause a penalty brake application?

• A. PTC, Crew Alertness Device, Locomotive Over Speed Device
• B. PTC only
• C. Crew Alertness Device only
• D. Locomotive Over Speed Device only

Answer: (A)

Penalty brake applications are automatic brake events used to enforce safety when a control or alert mechanism detects noncompliance or a dangerous condition. Positive Train Control enforces speed and movement restrictions; if the train operates outside its permitted authority or safeties are violated, PTC can automatically apply the brakes to stop or slow the train. The Crew Alertness Device is focused on ensuring the engineer remains attentive; if an alert is not acknowledged within the required time, the system will initiate a brake application to prevent unsafe operation. The Locomotive Over Speed Device continuously monitors speed against the allowable limit; if overspeed is detected, it will trigger braking to bring the train back under control. Since each of these features can trigger a brake when safety conditions aren’t met, all three can cause a penalty brake application.

Penalty brake applications are automatic brake events used to enforce safety when a control or alert mechanism detects noncompliance or a dangerous condition. Positive Train Control enforces speed and movement restrictions; if the train operates outside its permitted authority or safeties are violated, PTC can automatically apply the brakes to stop or slow the train. The Crew Alertness Device is focused on ensuring the engineer remains attentive; if an alert is not acknowledged within the required time, the system will initiate a brake application to prevent unsafe operation. The Locomotive Over Speed Device continuously monitors speed against the allowable limit; if overspeed is detected, it will trigger braking to bring the train back under control. Since each of these features can trigger a brake when safety conditions aren’t met, all three can cause a penalty brake application.