The cause was easy enough to identify: Data parsed by Kuhls and her colleagues showed that drivers were speeding more, on highways and on surface streets, and plowing through intersections with an alarming frequency. Conversely, seatbelt use was down, resulting in thousands of injuries to unrestrained drivers and passengers. After a decade of steady decline, intoxicated-driving arrests had rebounded to near historic highs.
… The relationship between car size and injury rates is still being studied, but early research on the American appetite for horizon-blotting machinery points in precisely the direction you’d expect: The bigger the vehicle, the less visibility it affords, and the more destruction it can wreak.
If the headlights are higher than another driver’s eyes, the light will go straight and downward into their eyes. There’s just no way to highlight the ground without blinding drivers in front of you if the headlights are so high.
If the head lights are angled properly then they won’t be shining straight down. They should be offset so they are pointing down and to the right. If you’re in front and you’re being blinded it’s because they aren’t angled.
The key word is “proper” installation. A lot of idiots don’t know how to do this.