Peter Calthorpe quotes:

We've concocted a system where local trips take an auto. That's our biggest tragedy. Streetcars, such as those used in Portland's Pearl District, and elevated people movers, like those in downtown Miami, are moving people from rail stations to their final destinations. But a new concept, PRT, may help revolutionize urban transportation, providing a cost-effective way to get people from train stations to where they need to go.

To Jane Jacob's three traditional urban values of civic space, human scale and diversity, the current environmental imperative adds two more: conservation and regionalism.