Your next commuter car could have two seats, three wheels and get 84 miles to the gallon. Elio Motors wants to revolutionize U.S. roads with its tiny car, which is the same length as a Honda Fit but half the weight. With a starting price of $6,800, it’s also less than half the cost. Phoenix-based Elio plans to start making the cars next fall at a former General Motors plant in Shreveport, Louisiana. […] Because it has three wheels—two in front and one in the rear—the Elio is actually classified as a motorcycle by the U.S. government. But Elio Motors...