Yesterday, we were driving to my son's football game, following two big black SUV's. We were merging into a traffic circle, at a place where the cars usually "zipper" merge, and another car tried to come in between the two, the back SUV's red and blue lights came on, making it clear it was a "chase" vehicle and not going to be separated from the vehicle in front. The other car stopped, and the two SUV's went off together. Because of all the high government officials, and diplomatic officials, this is a pretty common sight in my neighborhood, as are longer motorcades. The most uncommon part was that someone tried to go between them, most people know that two black SUV's won't want to be separated. It's more common to see the lights come on if a light turns yellow while the first car is committed to an intersection. So what do you see that people in other parts of the country probably don't?