Using the sensors from the phone (barometer, accelerometer, etc.), you can filter out seeming obvious non-driving trips once you understand what that data looks like.

I suspect we’ll also start to hear stories about apple detecting crashes when people are skiing/snowboarding this winter, as that’s also a common false-positive scenario. Again, using barometer signals and other sensors, you can start to filter those out.

Source: Work for a company who has crash detection technology that can be embedded into phones/apps