What action is taken if all auxiliary lights fail?

When all auxiliary lights fail, the appropriate action is to restrict speed and make repairs at the next stop. Auxiliary lights are critical for safe train operation, especially in low visibility conditions, as they provide necessary illumination for the crew and help signal train movements to other parties on or near the right-of-way. By restricting speed, the train can operate safely while addressing the failure of the lights, ensuring the safety of passengers, crew, and the integrity of the rail network.

Continuing at normal speed could pose a significant safety risk due to inadequate lighting, which could lead to accidents or mishaps. Returning to the initial terminal is generally not necessary unless the situation warrants additional safety concerns. Evacuating passengers is typically an extreme measure that would only be considered in situations where their safety is immediately compromised. Thus, the decision to restrict speed until repairs can be made balances operational safety with the needs of the passengers and the train's operation.