Energy Generating Roads?

These roads would generate energy using a three-layered solar panel instead of asphalt, by collecting the vibration of bridges or other parts of the roadways and harvesting the wind energy of passing cars. There also may be a road filled with tiny piezoelectric crystals that would be smooshed with each vehicle running over it. Each smoosh generates a small electric charge, and the net effect is that just one kilometer of this piezoelectric roadway would generate 400 kilowatts, enough power up eight small cars, according to the Israeli researchers behind the plan. A test is scheduled for next month.