from Kenworthy J., F. Laube, P. Newman, P. Barter, T. Raad, C.
Poboon and B. Guia (1999) An International Sourcebook of Automobile
Dependence in Cities, 1960‐ 1990, Boulder: University Press of
Urban Density and Driving Speed, Selected Global Cities
As the urban setting becomes denser, congestion tends to impair circulation.
While densities lower than 10,000 people per square mile tend to have
limited effect on driving speed, as soon as this threshold is reached,
driving speeds substantially decline.