Tiered or prorated insurance by milage isn't a bad idea. But any industry involving third party reimbursement is open to abuse and inflation. I've lived in states with different mandated insurance coverages and the states with mandatory insurance coverage more than doubles the cost of self pay areas. I lived in states where a cracked windshield might cost $100-$175 self pay. Lived in other states where they were specifically sold coverage for them and the average cost was $300-$500. The cheapest self pay I could find $235. Third party reimbursement perpetuates inflation because those providing the product/service base their prices on a big faceless evil corporation and not a person paying out of pocket or what the local market could bare other than insurance claims.Transportation, and the use of petroleum products, is one of the top reasons for our air pollution. Some people Need to drive a lot, due to their jobs...but most put thousands of miles per year on their vehicles, needlessly. They run to the stores, etc., several times a week, instead of making a shopping list, and doing it all on one trip. Millions of people fight the morning and evening rush hours, then the car sits in a parking lot all day. A tax on "Miles Driven", would go a long way towards making people rethink their driving habits, and find ways to make their vehicle use more sensible.
There are thousands of bridges, and many thousands of miles of roadways in this country that are quickly falling into major disrepair. We need to start improving this basic infrastructure, and finding more "creative" ways to finance these improvements. For those concerned about unemployment, these infrastructure projects would be a Great Way to create huge numbers of good paying jobs.