[adrianmonk]

> nobody is proposing that AV use will ever be FREE. Why didn't they charge a fee for every trip?

What is the future of self-driving cars (SDCs)? Are they going to be deployed as a service, or are they going to be privately owned by individuals and sold as an option when you buy the car?

If SDCs are a service, then a study needs to charge a fee to match that.

If SDCs are individually owned, then the incremental cost of an extra trip is just fuel plus wear and tear. In this study, the chauffeurs used the study participants' own cars, so the participants presumably had to pay fuel costs and wear and tear. So this seems to match closely what they'd pay.