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Full Diamond Intersection v2

If you are having any problems with a busy intersection in your city, this will fix it- a full diamond intersection. Cars can turn directly left, right, or proceed straight freely without any traffic lights, opposing traffic, or lane changes. All turns are at 45 degree angles. It's a design usually used as a medium volume highway interchange, and can easily be upgraded into one. It will work much better than a roundabout.

I also made a similar doubletee intersection (23x23), which is smaller but omits through traffic in one direction. http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=456663872

Edit: I edited this to reduce its size, and set the tunnels to -9m instead of -12m.

Dimension: 29x29 blocks (17 blocks from exit to entry), height of tunnels is -9m.
Construction Cost: $27,984
Upkeep: $287/week