Musical Freeway, Los Angeles :The Musical Road is a stretch of road that makes audible vibrations that are heard when traveling by car. The vibrations are transmitted through the wheels and frame of car, and they come out in different pitches, making it a “musical” road.The neat thing about this road is why it was built ? to help drivers stay awake, and some of the music in these roads can only be heard at certain speeds, encouraging the drivers to obey the speed limit.