[lkbm]

We could, but as they currently stand, but I've yet to see any analysis suggesting those come close to it covering the difference.

Most things do just look at parking and gas tax, but licensing fees are negligible compared to gas tax. The car sales tax might be a big source to make a difference, though. A few states don't have a sales tax on cars, but most do, and that may outstrip gas tax revenue if people buy frequently enough.