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There's a radical idea that could be looked into - have a very large autonomous car, carrying 20-100 people. With enough of them, we could reduce traffic, save money (Compared to the cost of private vehicle ownership) - and the best part is, from the perspective of the riders, it will be self-driving.

Why should we invest into self-driving carpools, when buses are cheaper, and more efficient?

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Fixed routes and last mile. Buses are particularly poor on that.

I'm thinking on mini buses, 10 to 20 pax, with flexible dispatching. A service where you tell where you live, where you want to get to every workday at what time. Algorithms pool people and make sure you don't have to walk more than a few minutes. Nor wait for long before journey or arrive too early.

Buses have poor last-mile economics because the overwhelming majority of commuters drive, killing any hope for economies of scale. If there were fewer cars on the road, bus coverage would be much better then what you're used to. (If we were to use 20-person mini-buses.)

I think you just invented the bus.

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