https://en.wikipedia.org/wiki/Highway_Trust_Fund
https://www.urban.org/policy-centers/cross-center-initiative... (“In 2021, state and local governments spent $206 billion, or 6 percent of direct general spending, on highways and roads. As a share of state and local direct general expenditures, highways and roads were the fifth-largest expenditure in 2021.”)
https://www.resilience.org/stories/2016-04-14/unpave-low-tra... (“The U.S. has 4.1 million miles of roads (1.9 million paved, 2.2 million gravel). About 3 million miles of roads have less than 2,000 vehicles a day, less than 15% of all traffic. The paved portion of these low-volume roads ought to be evaluated for their potential to be unpaved.”)
(very similar to how climate costs are causing agriculture and insurance costs to snap to reality, with similar sadness; debts coming due)