In 1997, Texas mixed discarded roofing shingles into two 1,000-foot Highway 31 test sections; years later, officials said their performance was comparable to conventional asphalt

• Highway engineers in Texas have shown that discarded household roofing shingles can be recycled into durable road surfaces that perform as well as standard asphalt after years of heavy traffic.
• In 1997, the Texas Department of Transportation (TxDOT) built two 1,000-foot test sections along State Highway 31 in the Dallas District using hot mix asphalt containing processed shingle waste.
• Long-term monitoring showed that the recycled road surfaces performed as well as traditional asphalt control sections.