SolaRoad manufactures modular solar panels for roadways and pathways. If you're going to test the durability and performance of an energy-producing solar bike path, where better to do so than in the Netherlands, where there are more bikes than people? Last November, the 230-foot SolaRoad test project in Krommenie rounded out its first year in existence, during which 300,000 cyclists, moped drivers, and even a few heavy construction trucks utilized it without any issues. The road, composed of a skid-resistant glass that covers the silicon solar cells, produced more energy than expected--enough to power three households for a year. While other companies have praised the concept of turning roads into solar panels, SolaRoad is the first project to actually try it in real life. This year, another 65 feet of improved road will be installed. The challenge will be keeping costs down: The three-year project costs $3.75 million.