This is like a double whammy. It happens with the morning commute, for those going east, and in the afternoon, it's much worse for those going west.
The sun glare of the hood of the car, and the reflection off the pavement causes LOTS of accidents, and even if you're walking into the sun, it is hazardous.
It's not so bad in winter, of course, because of the sun's position, but from April through October, you literally take your life in your hands if you have to drive toward the sun.
I have been in at least one town where the city fathers had the foresight to “twist” the whole place 45 degrees with respect to the dominant compass points so that NO street in the “old” part of town runs due east/west or north/south. As a result, in this modern, automotive age, the problems you describe simply do not exist.
Welcome to Nampa, Idaho:
http://maps.google.com/?ie=UTF8&ll=43.578277,-116.560092&spn=0.024592,0.035663&t=h&z=15&om=1
Glare reflected from hot pavement is one thing; that's why I insist upon having polarized sunglasses.
Glare from driving directly into the sun is another. I experienced that too much ("too much" can be defined as "at least once") when at school in Santa Barbara and working in Carpinteria, CA. Highway 101 leads directly into the sun too often there.
But the whitish glare is something completely different. If I don't don my (Polaroid) sunglasses, I will get a headache from it. And I don't recall encountering it so much from your near-equatorial climes as I do in Seattle. *\B-)