The noise level was well within legal norms, but the provincial authorities wisely choose to remove the 'singing road' after speaking with the local residents affected by the noise.

Ostensibly, the musical effect was a secondary objective; the primary purpose of this experiment was to test the durability of the specific type of rumble strips used¹.

1: http://www.lc.nl/friesland/Gedeputeerde-Zingende-weg-zou-tot...