Elevated 45-T-INTC (L) v1 for Cities: Skylines
This doesn’t require mods or DLCs, which means, it can be even used in Map Editor.
It’s recommended to place on flat ground.
Elevated 45-T-INTC (R) v1
Other 3-way interchanges(non-elevated, 45 degrees):
Compact left version
Made with help of: