the first subway in south america opened in the argentine capital of buenos aires in 1913 (the buenos aires underground). the oldest trains on the underground were used for almost one hundred years, and were not replaced with new cars until 2013. other cities in latin america with rapid transit include são paulo, brazil (são paulo metro); santiago, chile (santiago metro); and mexico city, mexico (mexico city metro). trains in santiago and mexico city are like paris and montreal as they are rubber-tired. although there are not as many cities with rapid transit railways as there are in europe or other places, many large cities operate bus rapid transit networks, which carry many people like railways and often have their own lane on roads, but use buses instead of trains. these systems are often designed to be converted into rail-based rapid transit in the future.