My personal experience isn’t documented, but I can tell you that if I see a driver weaving back and forth or driving very slowly-—sometimes in the passing lane-—it’s almost a given that the idiot is yakking on a phone. Yesterday a moron was slowly cutting in and out of lanes, once in front of a huge truck, without giving his signal. I knew he was on the phone-—and when I passed him, sure enough.
That doesn’t include the times I’ve almost been hit by people who can’t put the phone down long enough to drive.
If you were to be an invisible passenger with one of those drivers, I bet you would discover that when they are not on the phone they are doing something else that diverts their attention away from driving.
That’s the way those kind are.
I have been hit by a shopping cart in the supermarket by someone on their cellphone.