I rode in a new Chevy Silverado today and noted that on the windshield behind the rear view mirror there is a sort of rectangular area about 8" square of small dots. A small strip (about 1/4 inch wide) of these dots also run completely around the windshield. I asked the owner what they were and he had no idea. I think nearly all new vehicles have similar "dots" of one pattern or another.
Can someone please tell me what are these dots are for??