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Timboh's Three-level Roundabout Interchange
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703.691 KB
17 Mar, 2015 @ 11:21am
16 Jul, 2015 @ 12:10pm
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Timboh's Three-level Roundabout Interchange

In 1 collection by Timboh
Timboh's Marvelous Interchange Emporium
34 items
Description
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.
25 Comments
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Fortus Victus 17 Feb, 2021 @ 10:48pm 
Roundabouts... re-teaching the lesson that what looks good on paper doesn't work so well in the real world since 1960 (Here in the USA we managed to bully the engineers away from them until the 1990s)
Mr. Monday 26 Sep, 2019 @ 9:58pm 
@Ellyphant: I used it in one of my cities, and it did work (though I also use TMPE). However I had a huge jam on my highway, and after playing with different road sizes to try to reduce the jam I eventually replaced the whole thing with his Stack Interchange ( https://steamproxy.net/sharedfiles/filedetails/?id=407933040 ). That one worked much better.
Strawberry 8 Nov, 2016 @ 5:06am 
Does this actually work in game? As you said, the idea of a roundabout is that traffic within the roundabout has right of way, but I don't believe this is respected in game - on ramp traffic always has right of way (unless this has been patched without me noticing).
Thumb-Hands the Brave and Mighty 4 Sep, 2016 @ 2:24pm 
Well I am basically a toddler and frankly, mountains are awesome. So, did you make this for me? :D

Seriously though, you are, a godsend to all cities skylines players. Timboh = Quality.
{pDs} Rikaelus 21 Feb, 2016 @ 10:32pm 
Awesome looking but if drivers had stress levels that lead to accidents, I think a roundabout within two highways would peak it. I can't stand roundabouts under simple circumstances... lol
Ronan_Dubh 9 Nov, 2015 @ 4:03am 
Ireland is a bit stunted in the development of motorways and interchanges the part of the country that I'm from doesn't have any motorways within 150km keeping in mind the total length of Ireland is only 500km
Timboh  [author] 8 Nov, 2015 @ 12:53pm 
@Ronan_Dubh: Huh, seems like the TII are very strict about the shape. I went looking around in the bigger cities in Google Earth and, to my suprise, couldn't find a single non-circular roundabout! Well, there is this horseshoe-thing [] but that one is borderline a squareabout. I guess square rondabouts simply aren't a thing in Ireland. :)
Ronan_Dubh 8 Nov, 2015 @ 11:45am 
I'm Irish, so round abouts are a very common sight here, but they are seldom square, maybe, some oval but the vast majority are round
Timboh  [author] 8 Nov, 2015 @ 8:12am 
@Ronan_Dubh: The defining feature of a roundabout is not its roundness, but rather that traffic inside it has right-of-way. I guess you've never been to the UK ;)
Unfortunately you can't call it a squareabout, since that's a very different thing...
Ronan_Dubh 7 Nov, 2015 @ 1:13pm 
Why is the roundabout square?..........its a round--about