America's Most Fuel-Efficient Neighborhoods

"With the national average price of gasoline topping $4 a gallon, it's a propitious time to make the case for gas-sipping neighborhoods. Indeed, Americans coping with soaring energy costs are choosing to spend their economic stimulus checks at the gas pump and reduce their driving habits by billions of miles.

For every dollar working families save on housing, it spends nearly $2 on transportation, according to research by the nonpartisan Center for Housing Policy. Their research shows that of the 20 fastest-growing counties in the U.S., 15 are located 30 miles or more from the closest central business districts.

As some politicians see it, where you live is now a matter of national energy policy."