Source: data from Jeffrey R. Newman, Felix B. Laube et al., "An International
Sourcebook of Automobile Dependence in Cities: 1960-1990."
Private Vehicle and Public Transport Market Share, 1990/91
The above graph reveals three distinct categories of urban mobility
market share. In this sample, every cities above 30% in the public transport
market share are Asian cities. Between 10% and 30% are European cities
with some Canadian and Australian cities. Below 10% are American cities.