[BubRoss]

Wouldn't that be a trip that someone would normally be driving anyway? Also wouldn't it make sense to have a store deliver to lots of people on one circuit, this reducing traffic?

[CydeWeys]

No, once you don't need to drive it personally you can run a lot more errands, and thus will. See the linked article.

And look at how much more random stuff people buy when a click of a mouse gets it delivered to your house vs having to go to stores looking for it.

[BubRoss]

If one car is going in a loop and delivering to lots of people it would be less time on the road than all the cars of the individual errands.

[CydeWeys]

This doesn't seem to be the world we're headed towards though. People like owning their own personal vehicles and aren't likely to give that up.

[BubRoss]

What are you basing that on? In dense cities with good transportation infrastructure people don't own cars nearly as much and the people that do own cars use them less.

I think you are confusing necessity with desire.