Ideally we'd separately tax each thing appropriately: Tax carbon to account for emissions, tax road use (per mile in accordance with vehicle weight) to account for road wear, and tax congestion (by time-based demand for commuter corridors, bridges/tunnels, or central business zones) to account for the congestion cost of adding another car to the road.
I think the best idea is for people who want to ride bikes to ride bikes and enjoy their contribution to the environment without trying to impose taxes on people other than themselves.
Incentivising alternatives to driving reduces traffic, and is in the drivers' best interests.
Ideally, you and I would be the only ones left on the roads :)
If we really want to make a difference, electric cars should be heavily subsidized in the ballpark of 30-50%. Also have the government build out a charging infrastructure as part of the highway system. That would be a lot more bang for the buck against climate change than taxing waiters, clerks or everyday people trying to earn a living.
I have a great idea, we should mandate 100% remote work whenever possible, and the savings companies get from paying less rents should go directly to the employees (minus a 20% management fee of course) who are now supplying their own work environment. If only ..
Meanwhile, your car is spewing toxic fumes into the faces of those bike riders.
Argue for the idea, not the party.