I think Ray missed one important part. We all make decisions. We all like to make our own decisions and not have government or our boss make them for us. However if we are to make good decisions, they need to be made based on all the facts.
When it comes to cars, we should pay for all the true cost of our cars, including: purchase price, fuel, insurance, maintenance, repairs, roads, bridges … and the effect on others like noise and air pollution. Fifty cents would be a start toward all those goals. Paying additional tax to offset the cost to society for the pollution would be fair. As it is now, those who don’t drive still pay higher food bills, acid rain etc. but they don’t have anything to say about it and can not control it.