All I'm gonna say is if you reduce and optimize this design, you will end up with a round about.
In practice you're going to get vehicles wanting to change lanes. Merging from both sides of a road at once is a terrible idea.
It's a roundabout with an unusual shape. Saved you a click.
That's essentially how the UK does motorway junctions. Lanes go to different places, road signs a few miles in advance and written in white on the lanes. Generally we don't bother with the U turn options as relatively few people want to go in the opposite direction.
If it looks like magic, your country is doing this wrong.
Benefits of said junction include noone needing to slow down. Drawbacks include some fraction of people accidentally going in a direction they didn't want, using quite a lot of land, general construction cost.