The Economic Times

In 2004, San Jose used 1,000 tons of shredded waste tires beneath 2,000 feet of light-rail track; the unusual layer reportedly reduced vibration and saved over $1 million

The use of shredded tires as a base for light rail tracks offers a cost-effective solution for reducing noise. Many transit authorities have successfully implemented this method, leading to significant savings in construction costs. Additionally, using shredded tires prevents tires from ending up in landfills where they can pose environmental hazards. Despite successful trials, this method remains underutilized in many US transit expansions.