Toll motorways opened in the late 1970s by mayor Osvaldo Cacciatore, now used by over a million vehicles daily, provide convenient access to the city center. Cacciatore likewise had financial district streets (roughly  in area) closed to private cars during daytime. Most major avenues are, however, gridlocked at peak hours. Following the economic mini-boom of the 1990s, record numbers started commuting by car and congestion increased, as did the time-honored Argentine custom of taking weekends off in the countryside.