A nicely sweeping turbine interchange. No landscaping though, the screenshots show how it looks when placed on a nice map.
Size: 160×160 cells laterally, 74 cells across the diagonal
Base cost: 106520 (holy cow!)
Upkeep: 1244 p/w
Max height: 12 meters
Fine Road Heights Mod
Usable without mods!
Part of my real life-sized interchange collection.
Check out the guide I created on making these kinds of real life-sized interchanges.
Just about my highest-speed interchange yet, but also the largest, beating the cloverleaf by 80 meters in the diagonal. Again I’ve used Fine Road Heights to create some embankments on the left-hand connectors. I’d loved to have been able to place more but unfortunately the game always plops them down as bridges if you go above 6 meters (as far as I know).
Maximum height is 12 meters here, to provide for some more vertical clearance between the left-hand connectors themselves, and them and the mainline freeways as well. Still, there’s some really tight vertical alignment going on where they cross the mainline – as you can see in the second to last screenshot – and I had to use NoPillars’ overlap mode here to make it work.
The outer, right-hand connectors come in with 24×18 transition curves, which means that they have a nicely matching 80 km/h design speed; just like the doctor ordered for in-game Highway Ramps. The indirect left-hand turns are aligned at a more modest ~65 km/h design speed, with 27×27 90° curves and 11×11 45° ones, but they transition into really shallow 22 cell-long ends.
Overall, I’m really happy with this interchange. I feel that it emulates real-life turbine interchanges pretty well, and as I said, it’s my fastest design yet (even faster than the 5-level which I had to curtail a bit because of pillar placement).