What is the primary action required at an Approach Sign?

The primary action required at an Approach Sign is to proceed prepared to stop. This sign indicates that a train is approaching a point where it may need to stop due to conditions ahead, such as a signal change or an upcoming station. Conductors must be prepared for potential changes in the running conditions, which could require immediate action. By proceeding with caution and being ready to stop, conductors ensure safety for themselves, passengers, and the train.

In this context, the need for caution cannot be overstated, as it ensures that the conductor can respond appropriately to any signals or situations that may arise. It is crucial for maintaining the correct operational procedures and ensuring the safety of the train’s operations.