Here's a great quote from an article by Kunstler:
Of course, the single worst impediment to clear thinking among most individuals and organizations in America today is the obsession with keeping the cars running at all costs. Even the environmental community is guilty of this. The esteemed Rocky Mountain Institute ran a project for a decade to design and develop a “hyper-car” capable of getting supernaturally fabulous mileage, in the belief that this would be an ecological benefit. The short-sightedness of this venture? It only promoted the idea that we could continue to be a car-dependent society; the project barely gave nodding recognition to the value of walkable communities and public transit.That's about where I stand: barring a miracle such as nuclear fusion or $1/watt solar panels, we will have to fundamentally reshape the built environment around feet, bikes, and public transportation (and we should do so anyway for a host of other reasons). It will be incredibly painful and unpopular, and I have serious doubts about whether it can be done.