I've just discovered that Cities: Skylines does not in fact properly save road junction assets, but instead tries to very selectively rebuild it when you place it, or load it up again in the asset editor. For that reason, even though using this interchange in vanilla is still possible and it will technically work, you will need Network Skins and Move It, as well as probably Fine Road Anarchy, to fix the pillar situation once you've placed the interchange. More details in the updated description.

@VizzWard, I'm not sure I understand. I've checked, and all the roads are in the correct direction. I built this using left hand traffic. Did the game fail to convert it for right hand traffic? Can you show a picture?

a part of the highway is around, it is from the part that is elevated, is in the opposite direction a section

Thank you!

This looks awesome

STACKS!