the best answer is getting away from the gas tax altogether and establishing a mileage based user feeOh for sure. Totally regressive tax, that's why I said the billions in taxes be used to give low income people huge subsidies, depending on income and how much they drive. Also make it available only for purchase on lower-end evs.
Car manufacturers would love this as it would jack up sales and enable them to better judge the transition.
We use 370 million gallons of gas a day. Getting .15 or .20 more cents, all the way up to a dollar more per gallon in a few years is a crap ton of money for subsidizing new ev sales, as well as improving roads and upgrading the grid and charging infrastructure.
as fuel efficiency increases and e-vehicle use increases, we'll be using less and less gas. meanwhile, infrastruture and maintenance costs never go down...which means more and more increases to the gas tax will be necessary, which is just not politically feasible
make it a user fee, based on some kind of vehicle classification so you pay regardless of what fuels your vehicle