Please be careful making major road changes like this.

You didn't specify `oneway` on the segments, you didn't update the `lanes` count, you haven't added the route relations to the new segment, and you didn't specify turn restrictions for new/illegal turns. You also didn't draw the actual traffic island, which the note [1] was about.

I have reverted this edit for now, because it breaks routing.

[1] https://www.openstreetmap.org/note/4279595