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Timboh's Three-level Roundabout Interchange

Huazzah! The Roundabout Interchange is here, and if the Turbine Interchange is the most underestimated interchange, then the Three-level Roundabout is the most overestimated. See, roundabouts aren't free-flowing, not in theory at least. Roundabouts are designed to deliberately slow down traffic, in order to increase capacity and road safety. And since road safety isn't taken into account in Cities Skylines's traffic simulation, it only leaves us with the capacity, which is probably among the worst of all 4-way interchanges. Roundabouts should be used where most traffic simply keeps going straight, or where there's simply not enough space for a higher capacity interchange. That said, you do get a lot for the amont of space it occupies; it's among the smallest interchanges you can possibly build. Only the three-level diamond or U-turn interchanges are smaller, and those... Well, we're not even gonna mention those.

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Advantages:
+ Compact and classy
+ Direct ramps can easily be added onto it, if need be
+ A toddler could plop this down on the peak of K2!

Disadvantages:
- Has one of the worst capacities of all four-ways
- Some weaving does occure within the roundabout

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Cost: 50 660
Upkeep: 575 / week

In-game description: The true brittish way of connecting two motorways, giving you enough queue-time for tea and biscuits! Nah, they're not that bad.