Alaska, Hawaii, Maine, and Vermont got this right by simply banning all billboards.
I never understood why we're OK with placing billboards, which by definition try their best to get you to look at them, next to the road, which we're supposed to look at.
They should be at stoplights not on highways
Intersections are the most dangerous parts of highways, it is even more critical to be paying attention there.
Digital sign that only shows the ad on red light then.
Those need to be banned, the billboard trucks (and boats) need to be banned, and the shockingly bright headlamps need to be banned.