What action should a train take when it sees an Approach Sign?

When a train approaches an Approach Sign, it serves as a warning that the next signal is either a stop signal or may require the train to slow down. The directive to "proceed prepared to stop" means that the train must be ready to come to a halt if necessary. This is critical for ensuring the safety of both the train and passengers, as it allows the conductor to anticipate the need for braking in response to subsequent signals.

This approach helps maintain safe distances between trains and prevents accidents that could occur from proceeding too quickly when a stop is required. By being prepared to stop, the train operator can react appropriately to changing conditions on the track ahead.