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Paperclip Interchange

This looks pretty good! A nice compact way to squeeze in a full set of on- and off-ramps with only a single traffic light on the overpass.

I would make the highway exits normal ramps up until they join with each other, keeping just the straight approach to the four lane overpass as two lane road, but that shouldn't be hard to modify or to "upgrade" after placement. Removing the extra stubs of four lane road on the overpass would also make it easier to integrate this with existing roads with less bulldozing.

Used in Boulder Rapids; love the design.

Ramps have been elongated a bit to account for the slopes too steep problem.

Hey, I tried to use it but unfortunately no place seems to be flat enough for it... :-(