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> I’ve taken to yelling “get of your effing phone” at drivers obviously looking down at devices while I’m driving, walking or cycling around; I think the phone doing that would be more efficient.

My iPhone does do that. If it thinks I'm driving, it makes me tap a button that says "I'm not driving." in order to continue.

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This can be turned off in settings; I’d be interested in knowing how many of us have done that (I have mine on).

A fairly large number of people don't drive but have cellphones (Kids, NYC etc). So, I don't think numbers of people who turn it off is going to tell you much.

I turned it off because it kept disabling me when I was on the train (I drive about once quarterly). It's a good start, though.

You can have it only turn on when you connect to a car bluetooth device instead of using motion detection. It also applies if you have one of those bluetooth to auxiliary adapters if you have an older car.

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