I think your interchange here is very attractive to the eye! I am also creating a fictional city in Minecraft and since you seem to be very educated in this type of subject, I would like to ask for some advice - what type of interchange should I use in an area that is mostly suburban about 6 miles north of downtown (yes, I measured this all out, my block-counting brain-parts hurt) with most tourist traffic coming from the south? It is a four-way intersection, freeway-to-freeway, and both freeways have 4 lanes on each side of the highway. There is room for CD-roads.

The design can be compacted with only two levels, but nice anyway.

From the areal view this looks so nicely planned out. Good job, man!