Radical Cartography plots Urban Mass Transit Systems of North America — subways, light rail, busways — of U.S., Canadian and Mexican cities circa 2005 on the same scale. (via the Map Room):
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NORTH AMERICAN SUBWAYS
Bill Rankin, 2005, 2006
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At a glance, many metros seem to be comparable in scale, but what separates New York from Baltimore is density: station-to-station distance, line overlap, and linkages.
Most systems are organized as a hub with spokes; the two notable exceptions are New York and Mexico City, both of which are more like nets.
