[bluGill]

No I don't agree. When I go to work in the morning there is nobody at work who wants to go elsewhere and there won't be until lunch time. Either the shared car is burning fuel driving empty to get back out to where people live who want to get to work, or it is sitting in a parking lot. The first makes the shared car more expensive, the second is just what we have today so I may as well own the car and get the convenience of being able to store things in the car (golf clubs for example).

Even in the best case, there are lot more people who want to get around during "rush hour" than the rest of the day, so most shared cars could at most work for 2-3 people each day. The types of people who are on the road during not rush hour are more likely to have a larger group (kids) with them so the shared car needed for them is a different size.

[skohan]

So that might be true for people who commute from a relatively remote location to another remote location. For someone like me who lives in an urban environment, autonomous ride shading would absolutely be more efficient than owning a car.