Old tires as noise reducers? Researchers in Slovakia have found that recycled rubber in roads and sound barriers not only helps the environment — it also cuts traffic noise significantly.
In real-world tests, two road sections were compared: one built with conventional asphalt and the other with 1.2% crumb rubber from used tires. The rubber-infused road was noticeably quieter across all vehicle types, from cars to heavy trucks.
Using the “Statistical Pass-By” method, researchers measured noise under real traffic conditions and found consistent reductions in sound levels.
This solution not only creates a quieter driving experience, but also offers a smart, sustainable way to reuse tire waste — especially valuable in urban areas where traffic noise impacts quality of life.