How do "singing roads" work?

Singing roads are an innovative technology based on a special coating of the road surface that can reproduce sound when vehicles pass. This concept was first implemented in the city of Gelderland, Netherlands, in 2014.

The main idea of singing roads is that stripes of a certain width are applied to the road, and it is the combination of sounds produced when these stripes are crossed that creates a melody. As the car moves, the tires produce vibrations that cause sound waves in the road surface, and these waves reproduce the sound. The result is a melody or sound composition that drivers and passengers in the car can hear.

Singing roads can have various purposes. The main idea was to prevent speeding, as exceeding the speed limit turns the melody into noise that is uncomfortable for everyone in the car. Singing roads can also be used as an element of entertainment and tourist attraction.

However, it is essential to note that singing roads are still not a widespread practice and are at the stage of research and experimentation.