Option four: reduce need to drive around by bringing services closer to people and promoting remote working etc.

Option five: remove need to drive for shopping and such by creating "bus for stuff", you order things and get them delivered (near) home.

Option six: convert existing vehicles to electric (probably needs some form of battery innovation and might not be cheap even if price is offset by the raw metals salvaged from the engine).

Just a few examples of the obvious options. The truly clever smart options take more analysis (and a smarter mind than mine) to figure out.

The point: the search space for "reduce emissions (driving) because price of gas is insane" is very large, going full solar or poor don't drive are not really the only options.

If you don’t want it to hit poor people specifically you can subsidize the tax for them.