Google was the right place to pioneer robot cars.

When you are Uber, what we care about is the customer experience of getting somebody safely, cheaply, efficiently and reliably from where they are to where they want to go.

There was a pizza delivery robot from 2008, where I built a Prius to deliver pizza from downtown SF to Treasure Island.

I like incremental improvements or at least seeing where you're going to go and really being able to understand what's feasible at the time.

In 2008, no one else would ever have believed me that we were going to make a car actually drive everywhere, all the time.

You've got to push things and get bumps and bruises along the way.

I'm excited about bringing robots into the market, about having the most effect in the world.

If you ask people whether a computer can be smarter than a human, 99.9 percent will say that's science fiction. Actually, it's inevitable. It's guaranteed to happen.

After I joined Google and stopped working on robots - I'd built some self-driving tractors on farms in the meantime - I was always tinkering and playing with robots at home and just as a hobby.

Surface streets are probably a hundred to a thousand times more complicated than highways.