it's called "double glass" and new thing in US. Long story short it's hard peace of plastic that installs behind window and can be lowered as needed. Here's the link from utube, http://www.youtube.com/watch?v=1Gh3CBX1c5E
not the best video, but it's short.
So technically window is not tinted but u have like sliding plastic curtains. What you think?
my buddy told me it's depends on officer. Some bad cops already will stop you for no reason, beat you up and write up tromp up charge and having this curtains is like asking for extra beating by nj po.