Transit haters talk of how much public transportation loses and the public subsidy they receive, but they almost universally ignore the money lost on roads and highways and the public subsidy they receive. From the Texas Department of Transportation…
[An analysis of road building and maintenance costs] revealed that no road pays for itself in gas taxes and fees. For example, in Houston, the 15 miles of SH 99 from I-10 to US 290 will cost $1 billion to build and maintain over its lifetime, while only generating $162 million in gas taxes. That gives a tax gap ratio of .16, which means that the real gas tax rate people would need to pay on this segment of road to completely pay for it would be $2.22 per gallon.
This is just one example, but there is not one road in Texas that pays for itself based on the tax system of today. Some roads pay for about half their true cost, but most roads we have analyzed pay for considerably less.
Props to Bicycle Fixation.