The US has a refreshingly honest approach when it comes to funding transport schemes. What people pay in tax on fuel is what is made available to spend on transport. In theory. But it is not quite that simple. Of the 40c per gallon tax, around 20c goes to the Federal government. There it pools the money with that from every other state and redistributes it as it sees t, typically with the richer states giving to the poorer. Texas gets 80% to 90% back. Furthermore, of the 20c held by the state, around a nickel (5c) goes to education. So for every $1, TxDOT gets around 65c to spend on transport. Which basically covers maintenance. It's simply not enough.