According to WPB, the state of Maryland, USA, has marked a pivotal advancement in green infrastructure with the completion of its first rubber-modified asphalt (RMA) project, an innovative solution that utilizes recycled rubber from scrap tires blended into conventional asphalt to create longer-lasting and more environmentally responsible roads.
This development, implemented on Route 650 in Silver Spring, represents the result of a forward-thinking initiative led by the Tire Industry Association (TIA) in collaboration with local authorities and transportation officials. The project showcases how recycled materials can be successfully integrated into public infrastructure, offering both environmental and economic advantages.
The journey began in late 2023, when the TIA initiated conversations with Maryland Delegate Kevin Hornberger, encouraging the state to explore RMA as part of its highway system. Recognizing the material’s multiple benefits, including reduced road maintenance, prolonged pavement durability, and tire waste reduction, Hornberger became a key advocate. He drafted House Bill 781 to formally introduce RMA into the state’s construction agenda. Although the bill did not secure legislative approval, it sparked meaningful dialogue with the Maryland Department of Transportation (MDOT), laying the groundwork for future developments.
One of the most influential contributors to the project’s success was Red Clark, President of Asphalt Plus and a nationally recognized authority on RMA. His technical guidance and persistent outreach were crucial in educating lawmakers and MDOT officials. Through data-backed case studies and direct consultations, Clark helped solidify support for a trial project in the state.
This culminated in July 2025 with the official installation of RMA pavement in Silver Spring. Alongside this, Liberty Tire Recycling conducted a supplementary trial, further evaluating the material’s performance under varying conditions.
Reflecting on the achievement, Richard Dick Gust, CEO of the TIA, emphasized the broader implications of Maryland’s efforts: “What we’ve accomplished here is more than just a state-level success. It’s a scalable model for sustainable roadbuilding across the country. By working collaboratively, industry and government can tackle both infrastructure challenges and environmental concerns, starting with reducing the massive stockpiles of discarded tires.”
Maryland’s RMA initiative sets a promising precedent for other states aiming to modernize roadways while reducing environmental impact. This pilot not only demonstrates technological viability but also underscores the power of strategic partnerships in driving systemic change.
By Bitumenmag
Asphalt, Pavement, Road
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