Good magazine has a useful illustration of the world’s most frequently used subway systems (seen here in miniature).  While the illustration doesn’t tell us something we don’t already know — that other countries use mass transit at greater rates than we do, it does illustrate the degree of difference.  I for one was surprised to learn how much more the Mexico City and Moscow subway systems were utilized than their counterparts in Boston and Chicago.  It does help contextualize our energy consumption patterns.

HT: Planetizen