Which action by a train operator would NOT be considered a violation of the rules?

Sounding several blasts of the whistle when skipping a regular passenger station is an accepted practice. It serves as a safety measure to alert anyone nearby that the train is passing without stopping, thereby minimizing the risk of accidents. This action is consistent with safety protocols designed to inform passengers and pedestrians of the train's movement, particularly in areas where individuals may not anticipate that the train will not stop.

In contrast, ignoring red signals, not signaling at a junction, and speeding through a station area are clear violations of safety protocols that could endanger passengers, crew, and individuals near the train tracks. These actions compromise the safety and efficiency of train operations, making them unacceptable under standard operating procedures.