In 2005, Missouri turned old roofing shingles into part of Route 61/67; six years later, MoDOT still called the St. Louis County pavement's performance favorable

Every year, countless tons of discarded asphalt shingles fill landfills across the U.S. Since 2003, Missouri’s Department of Transportation has ingeniously repurposed these shingles for roadbuilding. This initiative has successfully minimized landfill waste while delivering substantial savings in road upkeep. Studies indicate that roads constructed with recycled shingles perform reliably, prompting other states to explore similar eco-friendly strategies for managing roofing waste.