There are more than 250 million cars and trucks on U.S. roads. From these vehicles, roughly 135 billion gallons of gasoline are consumed each year in the United States. In fact, 28 percent of energy used in the country is in the transportation sector.

While many may think that the majority of this consumption would come from planes or trains, personal cars and trucks actually consume 60 percent of all energy used here. Unfortunately, most of that energy is lost to heat and other inefficiencies within the vehicles, leaving only about 10 to 16 percent of a car’s fuel being used to actually drive and overcome road resistance.

However, the researchers at Virginia Tech may have a partial solution to this problem: harvesting energy from a car’s suspension.