France is going to start paving its roads with solar panels. The French ecology minister announced they will "solarize" 1,000 km of road over the next five years. If successful, it'll provide power for over 5 million people, or 8% of the population.
The Wattway is grippy, and the panels are thin and flexible enough to deal with the expansion and contraction of pavement that happens with temperature changes. Wattway claims that the panels last 10 years with heavy use, 20 with light use.