To dust you shall return. Transportation agencies in at least 27 states have removed paved roads that are underutilized or that they can’t afford to fix. A common tactic involves grinding damaged asphalt into gravel and spreading it over a “geotextile,” a rugged fabric that helps with erosion and stability. An organic solution can be used to tamp down dust. De-paving has become necessary in an era of tight budgets and soaring materials costs, and though rocky roads can be tough on cars, potholes can be far worse.