What indicates an over-speed detection in train operations?

An over-speed detection in train operations is indicated by the speed dial background turning to yellow. This visual warning is designed to alert the engineer that the train is approaching or has exceeded the speed limit, allowing for quick action to be taken to ensure safety. The yellow color serves as a caution signal, indicating a need for increased awareness and potential response to avoid further speed increase.

In train operations, it is crucial for the engineer to be aware of speed thresholds to maintain safe travel conditions and comply with operational protocols. The use of color coding, such as yellow for caution, helps reinforce quick recognition of potential hazards. Other signals, like a red background, might indicate a more severe issue that has already escalated beyond just over-speed detection. Such nuances in color coding provide layers of information to the train crew, promoting a safer operating environment.