Buenos Aires has about 200 bus lines with fairly high frequency (2-7 minutes during peak riding times) and almost all lines have overnight service, albeit at lo

Buenos Aires has about 200 bus lines with fairly high frequency (2-7 minutes during peak riding times) and almost all lines have overnight service, albeit at low frequency. Bus rides are highly subsidized. Congestion can get pretty bad during the day but you can get anywhere you want within the city.