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And what does a self driving car do when the left turn signal light fails? Only make right turns? Pull over to the curb and call someone to fix it -- wow, what an expensive repair call for a $2-$3 light bulb.
What do we do today? Use hands signals until you can go to an auto store (most people, of course just drive without it unknowingly)


The same thing that a human does when the light bulb goes out in the middle of a trip - continue driving until you reach your "home base," and fix it then. Of course, there's still a human being in the car - and probably sitting in the "driver's" seat. So the car can tell the human to perform the hand signals for the duration of that trip.

(as an aside it's pretty likely that things like turn signals wouldn't be used in contexts where cars are operating driverless - unless things get really advanced so that you have a mix of different cars).

Driverless cars won't be perfect. There will be problems. The question is whether those problems are greater or worse than current practices, especially since human error is such a big component in vehicle accidents. I would suspect you'll have far fewer cars driving with failed signal lights in even twenty years than you do today.

Albaby
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