I think I have found the worst drivers, per capita, based on vehicle.

It’s not this

Nope not this either

It’s this. Commercial vans (almost always white in color) with ladders on the roof. I rarely, if ever, see one of these being driven by a person NOT on the phone, which explains there constant swaying back and forth from edge to edge of their lane. It’s also pretty difficult to check blind spots when you have no windows on the side, and probably just as difficult to see what’s behind you when your rear windows are covered.