Subscribe to download
3-level Semi-directional T 40x62

Another prefab interchange created with Slope mod enabled and a modified Terraform Tool to create the semi-directional ramp going below the ground. This asset can be placed in the map editor, since no surface roads nor pedestrian paths are involved. All bridges are 9 meters above the network underneath, thanks to the Finer Heights mod. With combined features from the above three mods, this interchange has achieved a certain degree of realism. Still, it is short of acceleration/ deceleration lanes and taper ramps; hopefully these features will be added by new mods or by game developers.

More information:
--Footprint 40x62 cells
--Underlying terrain isn't modified despite it creates a temporary trench for itself.
--Demolishing the interchange will restore the terrain to normal.

Here[gfycat.com]'s a gfycat video recording of a car passing the interchange.
Another[gfycat.com] gfycat video recording the traffic flow. (watch normal speed at 0.25x)

Update-- A 54x98 version is available: http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=422058740
Please feel free to leave comments, thank you.

You can also download this asset from here on Simtropolis:
http://community.simtropolis.com/files/file/30386-three-level-semi-directional-t-interchange/