Like I already said, will go for the lightest black shade of tint for the front windshield, which is around 40% VLT if I remember reading correctly. At least the black shades have better glare reduction than the magic/chrome variants, say some consumers. Turning head to the gutter? Textbook teaching is different to reality especially with so many variables to take into account, having said that I've tried it before and it's fine for the first few punters but for the succeeding hundreds and thousands no thanks. Alternative sought.