California used 662,700 waste tires under I-880 ramp; no issues in 22 years

 Engineers faced challenges while upgrading a highway interchange in Milpitas due to unstable bay mud. They opted to use shredded waste tires as lightweight fill to prevent ground settlement. This choice reduced weight on the soft soil by 40 percent and saved significant project costs. Over two decades, the infrastructure has shown no maintenance issues or structural damage. Engineers faced challenges while upgrading a highway interchange in Milpitas due to unstable bay mud. They opted to use shredded waste tires as lightweight fill to prevent ground settlement. This choice reduced weight on the soft soil by 40 percent and saved significant project costs. Over two decades, the infrastructure has shown no maintenance issues or structural damage.