The first time I started through one, in Branson, Missouri, I went "what the heck is this?" And once I was through it, I went "well that actually makes sense."

They are building at least one where I live. I'm actually looking forward to it, as currently the lines to make left turns onto the interstate (at both ends) make it impossible to get through the intersection reasonably. It shouldn't take 30 minutes merely to cross an interstate on a 4 lane road - when a couple blocks either side of the interstate the traffic on the road is flowing freely.