This is a Tale of Two Types of Cities.  One type of city has a dense, walkable center with cultural attractions, jobs, farmers markets, and residential neighborhoods easily accessible by foot, bike, or public transit. The other type has lower density, a poorly or undefined center, separate centers of business and residential life, and is generally only accessible by car.

We compared these two fundamental types of cities' underlying infrastructure, food and mobility as part of an economic competitiveness analysis.  With gas prices on the rise and $3 or $4 a gallon gas on the horizon, SustainLane.com took a close look at the 50 largest U.S. cities to see which are most prepared and which are most vulnerable to an extended gas price shock in the $3 to $8 dollar a gallon range. Those cities that can reduce or stabilize their spending on gasoline will keep substantially more money in their state's economy, rather than siphoning it overseas.