My brother sent me some pictures today of RapidScreen mobile emissions testing in Colorado. They have a few vans set up as you accelerate onto the freeway. Its not to bust you, it simply means if you have a 1982 or newer gas vehicle and you pass by their van twice in a 10 month period, and you pass the test both times, they send you a letter in the mail saying you dont have to get your vehicle emissions done when it comes time. I guess to keep the congestion down at the emission places. My brother thought he was going to get a ticket or something with his old work van, till I looked it up. Arizona needs these, last time I went it was scorching outside and I sat forever.