An interesting look and breakdown at the cost of Urban Sprawl in the United States. While the conclusions are both predictable and obvious it's good that someone crunched the math. I'm guessing that they've underestimated it greatly, Calgary's sprawl alone must account for several billion dollars squandered annually...
Link: http://www.citylab.com/design/2016/06/cost-of-sprawl-us-commuters/486170/