I had exactly this driving east on the A64 near Malton about a month back, luckily or sensibly, I had seen the glow of the low sun behind a hill, so the sun visor was down, and my sunglasses were put on top of my head ready to deploy, the road was wet, and going up the hilly bit of dual carriageway 3 cars overtook me, as I crested the hill the sun was so low that it filled the horizon fully and reflected off the road too, the sunglasses were slammed down immediately and the sun visor was tweaked just quickly enough to glimpse the three overtakers piled into each other, I can only assume the first car had just stopped dead on a National sped limit dual carriageway, I had a fraction of a second to avoid the sun, it didn’t matter what you did, you were blinded by that sun, it was so bad the road was closed until the sun got out of the way, WW2 pilots didn’t go on the saying beware the hun in the sun for nothing, when the sun is like that you are blind, end of story, I was dazzled by it for the fraction of a second as the sunglasses were put on