While the U.S. Census Bureau estimates that installing solar panels on every home in America would produce 3.75 trillion kilowatt hours of electricity a year, ... photovoltaics still account for no more than 1.13 percent of America's power production. [What] can municipalities do? It's not like they can pave the streets with solar panels. That's where the husband and wife team of Scott and Julie Brusaw would beg to differ. Since the mid-2000's, Scott, an electrical engineer, and Julie, a psychotherapist, have been developing special solar cells encased in rugged, hexagonal-shaped glass. Lay enough of these mechanical cobblestones together and you've built yourself a kind of hybrid driveway/solar array. For the Brusaws, the prototype, while impressive, makes up but a tiny chunk of a much more ambitious vision. According to their calculations, covering the nation's nearly 28,000 square miles worth of roads, highways and parking spaces with these special panels would produce three times the nation's total energy consumption. [In their vision], the panels would serve as the foundation for a do-it-all smart" roadway system that's capable of not only harvesting energy, but also making roads safer by using heat to remove surface ice and lighting up dark pathways with embedded LEDs. The "Solar Roadway" project, which the Brusaws proposed, was promising enough that, in 2009, the U.S. Federal Highway Administration awarded them a series of contracts to further their concept.