About This File
Comes in 3 types. The differences are marked in the screenshot showing all 3. Just different ramp setups for the elevated highways. The most expensive, type 3, is just under 56k making all three cheaper than the All-Directional Interchange I made as well as having an even smaller footprint. Only 2 very small areas slightly go past the aforementioned interchange area and only 2 short spans of ramp go to the 3rd level - the on ramps crossing over the elevated highway exits.
Hope it helps, enjoy.