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Transport in Mega-cities -- Does city size matter?

Georges Darido's picture

I just returned from São Paulo, perhaps the third biggest metropolitan area in the world with a population of 18 million and an endless vista of apartment towers and commercial buildings in almost any direction from the center.  The traffic problems are large and reported in the daily newspapers as the peak number of kilometers of the main road network in congested conditions (equivalent to LOS F).  This indicator tends to range between 100 and 200 km for any given day.  The resources that