For people to comply with the speed when driving Japanese rarely apply the form of speed shot or deceleration ramp. Instead, they create "musical paths" that are the road segments when the car passes will produce the melody made by the wheel itself.
Pavement is designed by different depths and widths and is carefully calculated in pitch, intensity and pitch according to the music knowledge.
When the wheel comes in contact with the road surface, it produces a continuous sound that produces a complete melody. To get the most out of the tune, the driver just needs to get in the car and close the window and drive at the right speed on the sign. If the car is running at a high speed, the sound creates a very jarring
as a warning. And if it ran too slowly, the sound would be like a The tape was shattered and it would not sound interesting.
This unique concept has been adopted by many Japanese cities to help reduce traffic accidents and drivers are also relaxed when driving.
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