I've advocated for new development to minimize auto dependence. But many take that to mean that everyone ought to travel by train, bus, bike or foot. However, new living patterns need not resemble existing living patterns. New residents won't necessarily interact with communities in the exact same way as existing residents. We don't need to get rid of cars. What we need is to avoid adding many new cars.
Call it "low-traffic growth." Our population is growing, and our region will inevitably grow. The question facing leaders and planners is how and where that growth should take place. In the absence of infill and transit expansion, that growth will happen in Fauquier and Frederick Counties, in West Virginia, western Pennsylvania, and southern Maryland. If people live there, they'll have to drive long distances, which means they will contribute more cars and more traffic.
Or, most new housing could add infill development to areas close to jobs and to transit. We could bring in new residents who don't commute by driving. That will enable the region to have more people, more jobs, and more revenue without more traffic. In DC, Arlington, Alexandria, southern Montgomery County, and other fully built-out areas, there just isn't room for more roads. We can either grow without adding traffic, as Arlington has so successfully done on the Rosslyn-Ballston corridor, or see our roadways grow more and more gridlocked, lowering the appeal of jobs in our region.
We are in the middle of a paradigm shift in the design of our communities. The sprawl model of development that predominated for sixty years isn't sustainable and, more importantly, no longer what the market wants. Prices in established walkable neighborhoods are sky-high while nearby walkable neighborhoods are gentrifying rapidly. We have enough single-family homes for the next 20 years; in fact, nationwide, analysts predict we'll have 22 million too many.
There's nothing evil about wanting to live in a house with a yard and a picket fence. Some government policies may unfairly subsidize that form of living with cheap infrastructure, but it's still a totally valid way to live. It's just that there are lots of those houses. Meanwhile, there aren't enough condos and row houses in walkable neighborhoods. Many families want to live in them, but can't. But even without the families, there isn't enough supply.
http://greatergreaterwashington.org/post.cgi?id=3192http://www.eschatonblog.com/2009/09/low-traffic-growth.html