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Notes -
Why are headlights getting brighter? Isn't their brightness regulated? It's getting to the point that if a pickup truck (by the way, why are cars getting bigger too?) is passing me, I will often hold up my left hand to shield my eyes.
You might start here.
"The trend toward improved headlight illumination has been fueled in part by manufacturers seeking higher safety ratings from the Insurance Institute for Highway Safety, Professor Kennedy said."
Yes, but policing of headlights is pretty unusual.
Safety ratings may also play a role here, but emissions laws that exempt larger vehicles have recently been blamed as well.
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