Sorry, I meant empty cars. Even though that would create a job market where you pay people to sit in a car to avoid taxes (hire teenagers for that?), so maybe just tax cars by miles driven instead of on a fixed basis.

The only reason we don't tax by usage is because we don't have the data. If cars have that data, it would be by far the superior system. Why tax someone driving 100mi the same as someone driving 100k miles?

I think the intention was to say self-driving vehicles with no passengers, though I could be wrong.

The reason being that a car driving itself around with no one in it is essentially wasting resources and spewing out emissions. The example comes up often in what-ifs about self-driving cars.

Ahh, well that I can get behind IF they are in congested traffic because one of the big advantages of driverless cars is mine can drop me off at work then go park in a charging garage across town. I wouldn't want to be taxed for my car driving on a wide-open road to a more efficient location.

You'll still pay for it indirectly through the cost of gas and putting miles on your car though. Which is the ideal way to "tax" usage anyways.