What is the name of the man who blows the whistle for a train to go out?

The man who blows the whistle for a train to go out is typically referred to as the "conductor" or "engineer," depending on the context and specific duties. In some cases, the person responsible for signaling the train's departure may also be called a "brakeman" or "trainman." These individuals play a crucial role in ensuring the safe and timely operation of trains.