I wonder if anyone has done any studies about lack of turn signal use being tied to phone in the hand that normally operates the turn signal. The amount of add

I wonder if anyone has done any studies about lack of turn signal use being tied to phone in the hand that normally operates the turn signal. The amount of added background commute stress caused by almost everyone on the road ignoring their turn signal these days is infuriating. It makes everything take longer, and every delay gets magnified multiple times by multiple people in a causal chain not doing it. This increases stress, road rage, increases commute times, gridlock, everything connected with driving decision that involves meshing with the moves of the cars around you, which now defaults to the worst case defensive scenario- i.e. that everyone who, say, could swerve into your lane when you try to merge, is likely to do so, so you wait multiple times longer to get on to a highway or turn onto a two or three lane thoroughfare, than you would have to if people would just perform what has to be the simplest yet most beneficial gesture of productive cooperation. Even navigating a 7-Eleven parking lot turns into a needlessly guessing game. And yet if you try to raise the subject among casual friends, even in a joking manner, they look at you like you're some kind of anachronistic Barney Fife character.