What does the signal that means 'proceed with caution' indicate?

The signal indicating 'proceed with caution' conveys essential information regarding the safe operation of trains, particularly in situations where full speed may not be appropriate. This signal suggests that while trains are permitted to continue, they must do so with vigilance due to potential hazards or irregularities ahead, such as track work, signal failure, or other trains in the vicinity.

When trains are instructed to proceed with caution on a diverging route, it means that they should be aware of the change in course and any corresponding speed restrictions. This instruction ensures that train operators remain alert to possible challenges or obstacles that may arise as they navigate diverging tracks, thereby enhancing safety and reducing the risk of accidents.

Understanding this aspect is crucial for train operators, as it emphasizes the importance of maintaining a careful approach when conditions are not optimal for safe and efficient travel.