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Dirt Roads make up 1/3 of all roads in the United States and they require more than a sprinkle of gravel and a steamroller to make them functionable and durable.

Both chemists and engineers use crazy science to make that top layer of dirt more like concrete than the average dirt out in the farm field. 

In this episode, Royal Marty, CEO of Substrata, offers a fascinating, easy-to-understand explanation of what goes into making modern-day dirt roads. He also shares just how important these traffic corridors are for rural America.