You're joking. I live in the Washington region and the traffic here is always ranked as #1 or #2 worst in the nation. Even on a Saturday afternoon in the Maryland suburbs, the main road through Bethesda, Rockville and Gaithersburg is gridlocked. The DC Metro only carries a small fraction of the commuters. It only extends about ten miles into Virginia, a short way beyond Arlington into Fairfax County, while the population density extends all the way to the other end of the county and on into Loudoun County. It only extends about fifteen miles into Maryland, just to the northern limit of Rockville on one side and a few miles past Silver Spring on the other, while the population density extends all the way up to Frederick County to the north and Howard and Prince George's County to the east. The answer is not bicycles or tax-subsidized public transit schemes, but telecommuting.