That won't work. The problem with polarized glass is that, by its very nature, it's filtering out ~half the light. This is why cameras don't normally come wit

That won't work. The problem with polarized glass is that, by its very nature, it's filtering out ~half the light. This is why cameras don't normally come with polarizing lenses: it'll make them perform worse in low-light situations. So you won't be able to see quite as much, with half the light blocked. Of course, our eyes are logarithmic, so this might not be that big a deal, and it might be worth it, but you'll never get the US government safety agencies to agree to this. They already forbid anything which reduces light transmission through the windshield below the "AS400" line (the optional tint strip near the top). They already won't allow aspheric side mirrors because those "confuse" drivers (even though cars in Europe have them).