The cost of driving is much more than the cost of fuel and a car.
If bicycle were used as the transportation, it would reduce the ilness absence. Economy loses billions and billions due to the illness absence. Besides strong enrgetic people can produce better goods.
Fuel can and should be taxed to build infrastracture for mass cycling: trails that lead to offices, parking lots for bikes, office showers, etc.
It seems to me that the car exhaust damages environment much more than tobacco smoke. So why can the pack of cigarettes be taxed up to 5 unit of currency and one gallon of gas can not cost 5 units of currency?