Since 2008, the federal gas tax has only covered about half of federal highway expenses. The other half comes from: regular old tax revenue from everybody, no matter if they drive or not. That’s right, today’s hottest and most subsidized technology is: highways.
I've always found it delightfully ironic how anti-socialist Texas meekly accepts federal funds for it's highways but adamantly abhors toll roads as unjust to their independent spirit.