Richard Florida spends some time in the car:

Commuting costs America an estimated $90 billion dollars per year in terms of lost productivity and wasted energy, according to the annual Urban Mobility Report. Our own detailed calculations by Martin Prosperity Institute (MPI) research director Kevin Stolarick find that every minute shaved off America's commuting time is worth an estimated $19.5 billion dollars.  That translates into $97.7 billion for five minutes, $195 billion for 10 minutes, and $292 billion for every 15 minutes saved nationally.

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