Once again, you have faulty logic behind your argument. Vehicle damage is only part of the cost of roads? Indeed. Just like the weather is the largest cost of vehicular upkeep. Wait, that's not right. Yes, weather affects both roads and cars, but that cost is trivial compared to miles. Hey, I've got a garage-kept vehicle with $600,000 miles to sell you, and I'm going to charge you the fair price of 90% of its original cost. C'mon, it was kept in the garage, so it's like brand new with only 600,000 miles on it. Further, tax policy includes incentives, such as encouraging people to move away from single-occupancy automobile transportation. I'll leave it up to you to discern why. See? Now you have something that will uniquely perplex you and keep you pondering till the end of your days.