GEOGRAPHY IN THE NEWS:
As they grow, cities develop into all sorts of shapes. But one principle seems to remain constant: the shape depends on prevailing transportation technologies and routes. In 1994, an Italian physicist, Cesare Marchetti, observed that across history most people have been willing to accept a commute of 30 minutes or less. This article looks at the way the Marchetti Constant has influenced the development of urban areas from ancient Rome forward, depending on if the prevailing technology was walking, carriage ride, railroad, street car, subway, automobile, etc., and what it might mean for the future of urban planning. www.citylab.com/transportation/2019/08/commute-time-city-size-transportation-urban-planning-history/597055
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