I had to Google this to see if it’s what my town did. They did mention the term when they were modifying the road. But no, we have the idiotic version of it. They eliminated all left turns on the main road, but then added in new lights half way between each intersection for u-turns only. So they have effectively doubled the number of choke points on the busy road. All of the side roads are the same thing, no left turns. You have to turn right onto that busy road and then pretty quickly get over into the left lane for the u-turn lane.
Most of those u-turn spots have lights, but a few do not. My street just happens to be one of those. If you want to head to the left from my street at rush hour, it is essentially impossible. There is never a gap big enough to make that u-turn.
This whole setup has created the thing that I hate most on the roads right now. Those main intersections where you can’t turn left, people make illegal u-turns through them at pretty much every single light cycle. And they don’t give a ***** that someone on that side street is trying to turn right. I’m am dodging those jackasses every single day.