America On The Move

This special series highlights stories and activities inside the Smithsonian Institution's America on the Move exhibit.

A new activity area has been added to the Smithsonian Institution's

America On The Move


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

Porous Asphalt is King


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...