Interesting article on "Smart Growth" at Asymmetrical Information.
"his calculations show that when compared with the social costs of transit systems (like taxpayer subsidies and noise from buses), the car is at least twice as cheap per passenger mile as transit"
I still think increasing automobile efficiency and nuclear power are the best ways to improve the pollution situation. Congress ought to just suck it up and push the CAFE standards, and bump up fossil fuel costs (not just gasoline taxes).