This Indonesian Toll Road Can Sing: Check the Location and Function

JAKARTA - Did you know that there is a toll road in Indonesia that can produce sounds as if it is singing? This toll road uses markings in the form of rumble strips. So, where is the location of the toll road that emits such sounds? “For now, the singing toll road is only available on the Ngawi-Kertosono Toll Road,” said the Head of the Toll Road Regulatory Agency (BPJT) of the Ministry of Public Works, Wilan Oktavian, to Kompas.com, quoted on Monday (06/04/2026). Meanwhile, the second point is at Km 644+200 with six notes, thus producing a more complete sound resembling the song “Happy Birthday to You”. The installation of rumble strips was carried out based on evaluation results with close spacing adjustments. This is intended so that the sound produced can be clearly heard inside the vehicle when the car passes at speeds of 80-100 kilometres per hour. Highway hypnosis is a condition of decreased concentration while driving for a long time. As a result, the driver can lose momentary awareness and risk losing control of the vehicle, which can trigger accidents.