Only 3 states Delaware, Montana, and New Jersey raise enough revenue from cars to fully cover their highway spending.
The remaining 47 states and the District of Columbia must make up the difference with tax revenues from other sources
By diverting general funds to roadway spending, the burden of paying for the roads falls on all taxpayers, including people who drive very little or may not drive at all.
Source: https://taxfoundation.org/data/all/state/state-road-taxes-funding/
Yes, roads are important. Attributing costs to who or what is causing those costs is still a good idea.
Paying for roads is fine, paying for 10 lanes of roads that only exist because the real costs aren’t included in all kinds of decision making is dumb.