It indicates a change in our lives, but we do not do it alone, but surrounded by all that we know. Getting on a crowded bus (subway, railway and train) reflects the need for relationships with others. If the bus is empty it indicates our shyness. If we see when the bus arrives, some passengers get off before we get on it, it means that this life change is not definitive. If we only see the bus, that indicates that we will receive a proposition that can change our lives although we have not yet decided whether to accept it or not.
Read more about dreaming of Bus, subway, railroad, train in other dream meanings interpretations.