You mean the fuel taxes that everyone pays, which is routinely raided for things like LRT railways virtually no-one uses, and giveaways to Warren Buffett's freight railroad company?

Here in PA they took $40 million from the fuel tax fund and gave it to the railway companies to modify all the underpasses, so they could stack containers 2-high all the way without the top one getting stuck. And that is just one state, and one example.

If anything, fuel taxes and road maintenance are one thing the govt (sort of) gets right, in that it is a tax on usage of something and automatically scales up or down depending on how much you use the resource. If only they would stop stealing from the funds for non-highway purposes...