While I think an alertness sensor is probably a good idea for drivers, I don't think an accelerometer is a useful way of going about it. These don't really noti

While I think an alertness sensor is probably a good idea for drivers, I don't think an accelerometer is a useful way of going about it. These don't really notice that a user is asleep until they have entered a fairly deep sleep, which is fine for pausing a TV show but far too late for alerting someone who is operating a motor vehicle. With Netflix if the accelerometer doesn't notice you've fallen for 5 minutes before pausing, that's totally fine. If the user is operating a motor vehicle and has been asleep for 5 minutes it'll be a miracle if they're still alive.