I don't care too much about people's energy use, and, if people want to live in McMansions two hours from work, so be it.
However, I do object to the subsidization of urban and suburban sprawl by tax-supported highways. I also object to the public subsidization of home ownership via the mortgage tax deduction. (I am a flat-taxer.) From the Globe:
Nathaniel Baum-Snow of Brown University found that each new highway passing through a central city reduces its population by about 18 percent. The home mortgage interest deduction further encouraged suburbanization, because rental units are disproportionately in cities while owner-occupied homes are disproportionately distant from city centers.
Note - sorry, those older links are now behind a paywall. Greedy capitalists at the Boston Globe are messing up our efforts to give them business.