France has recently decided to start building a new endeavor: a 1,000-kilometer long solar road. The project, formally called “Wattway,” is a joint effort by the National Institute of Solar Energy and the French civil engineering firm Colas.(1) According to Colas,, “one kilometer is enough to power public lighting for a city of 5,000 people, and 20 square meters of Wattway can power a single French home.”(2).
