Commuters in the United States are collectively incurring billions of dollars in extra costs as a result of sprawling nature of the country's leading urban centres.

A study produced by Daniel Hertz of City Observatory has employed an innovative method to more accurately quantify the hidden costs created by urban sprawl as a result of extended commute times. The index developed by Hertz found that commuters situated in the 50 largest metro areas in the United States collectively spend…