My impression is that local roads are paid for heavily local real estate taxes, state roads are paid for via state gasoline taxes, state license fees, and tolls, Federal roads and bridges are paid for via the Federal gas taxes and tolls. My impression is that the Federal Highway Trust Fund is funded by Federal gas taxes and gets used also for purposes other than Federal highways and bridges.

But I don't have good data. I want good data but don't have it.

E.g., there are a lot of roads and bridges that are not Federal, e.g., not the Interstate highway system. So, when I hear that the gas taxes don't pay for all the roads and bridges, I think, of course not -- e.g., my local roads and bridges are paid for heavily, maybe mostly, by local real estate taxes, and in my area that is fair -- everyone here needs the local roads and bridges.