Yes, we could go round in circles forever. We have no idea what the State spends on roadway maintenance and construction, nor how this stacks up with other states, or what it would cost to make overall improvements to what we have and how that would stack up.
It boils down to this: you are critical of everything the government does just as a matter of principal and I argue that, yes, they are corrup and inefficient -- but so is private business. I actually think our government is OK even if our president is a crook and our State governor mediocre. You think our government sucks, and the president is mediocre while the governor is a crook.
Mistrusting the government and power in general is healthy. Questioning where our money goes is my right, and also wise.