Yes. The passenger in the car sitting next to you senses when something tricky is happening with the driving and shuts up or otherwise calls your attention to t

Yes. The passenger in the car sitting next to you senses when something tricky is happening with the driving and shuts up or otherwise calls your attention to the danger. Someone conversing with you on the phone doesn't. Kids talking to you from the back seat are also a potentially more dangerous distraction for the same reason.