America On The Move

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See how we got here and explore how transportation shaped our lives, landscapes, culture, and communities.

Porous Asphalt is King

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Porous asphalt is an all-natural material using rocks glued together with asphalt cement, like most standard roads, but with one difference.

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What is Asphalt?
"What is asphalt?" you ask. Asphalt is the sustainable material for building pavements. It's smooth, so vehicles consume less fuel and produce lower emissions; it's quiet, so expen...