What are these people waiting for? All these ladies and gentlemen are standing patiently in line at the bus station waiting to get on the bus home. As a rule, be prepared for a crush of people around rush hour. Then it is most likely you will see insanely long lines for a colectivo, especially in the city center. In general you don't need to expect such huge queues but some routes seem to be more frequented than others. Riding the bus in Buenos Aires, however, is interesting and a great possibility to mingle with locals.