You read that right, the roads that actually sing. There are no speakers or MP3 players in this case. The roads have ridges on them and when the cars speed over them, they sing! Mind you, you need to go as close to the recommended speed as you can to get the songs in the perfect rhythm. Otherwise it would just sound like when the audio cassettes of old times get stuck in the machines. I think I should just let the video do the explanation and give you a preview. See it to believe it!