Whether state of federal, it is still our money.
Other than sustaining interstate travel, the feds have no business being in the road business.
If the States and the Feds hadn’t stolen the gasoline tax our roads and highways would be in great shape.
The railroads built interstate arteries just fine without federal interference. I suspect that private road builders could (or could have), as well.
The interstate highway system is still the largest public works project in the nation’s history. And the trust fund was originally never meant to be perpetual, or so the politicians claimed.