$10/gal gasoline is not the answer, because it's a regressive tax that just prices the bottom of the socioeconomic ladder out of the transportation they need to get to work. It also adversely affects businesses that can't use public transit, like technical service people with tools and materials, and delivery drivers. The actual answer is to build a comprehensive mass transit system that makes driving unnecessary for most people. Trying to force people to use an inadequate public transit system by making the alternative unaffordable is just a shitty thing to do to people.