[adrianmonk]

> For example, the chauffeur could bring the kids to soccer practice and back or drive a friend home and then return to the house. They could even pick up groceries and make a Target run to simulate a driverless car future where items could get bought online and loaded into your AV by a store employee before returning home.

The survey measured the additional faux-SDC trips, but did it also measure the trips that did not need to happen as a result of this?

Would the friend have taken an Uber home? Would the study participant have just driven their own kids to soccer practice or driven themselves to Target? Some of these trips probably would not have happened, but surely at least some of them would have happened, just in a different car or with the car owner doing the driving.

They've already acknowledged the study is imperfect, but I think this is an important question to consider when interpreting the data.

Another issue is that this study simulates what happens when one person has access to a SDC but all their friends do not. If all my friends have SDCs too, they won't usually need to borrow mine. The friend is likely to take use their own SDC to get to my place and ride home in it, so that wouldn't count against my SDC's ride total.