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6-Way Raised Roundabout
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Assets: Intersection
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659.719 KB
12 Sep, 2020 @ 3:46am
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RichAntDav
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6-Way Raised Roundabout

Description
Oct 2020 UPDATE: This video was used in a Steam Guide:
https://sp.zhabite.com/sharedfiles/filedetails/?id=2255660608
and accompanying video:
https://www.youtube.com/watch?v=4HOWaFOPNlc
that I made which evaluates and compares a range of 6-Way intersections


Presenting a compact 6-way intersection that uses a raised roundabout. The main difference in this design is that there are short-cuts/slip lanes for vehicles travelling to the immediate right and left highways. Having the Left turning shortcuts means that traffic that would have gone most of the way around the roundabout now does not need to use it all, cutting out a lot of traffic.

The precursor for this intersection is my similarly styled 8-way Double Roundabout Interchange (https://www.youtube.com/watch?v=JTPGrkxb9K0)

Note: I recommend the use of the TM:PE mod in order to cut down traffic weaving, getting on and off the roundabout. As a Cities:Skylines asset I've added it to the Steam Workshop (links below) so anybody can download, modify and use it.

Details:
Required DLC: None
Required Mods: None
Recommended Mods: TM:PE
Subscribe For Updates: https://www.youtube.com/channel/UCS5h90tCEQNDBqGrcia4UKg?sub_confirmation=1
Youtube Link:
4 Comments
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rjo7132 10 Nov, 2020 @ 1:30am 
just looking at flow and intersections i am thinking would a single lane off ramp from the upper roundabout to the short ground level off shot under the on ramp be good to stop the congestion at the on ramp on the upper roundabout just a thought
me22ca 13 Sep, 2020 @ 2:58pm 
Glad you liked the guide! The way CSL zones on curves has always annoyed me, so I pretty much always use grids for RICO, and wanted to find a good one :)

I look forward to seeing your take on Ys. I mostly use my Double Triangle interchange -- https://sp.zhabite.com/sharedfiles/filedetails/?id=2056199123 -- which I think has a certain elegance to it, but it isn't particularly exciting or pretty.
RichAntDav  [author] 13 Sep, 2020 @ 2:25pm 
Thanks me22ca dude, much appreciated.
You're right about pretty much everything. With a roundabout interchange it's essential to use TMPE,and even then you're going to be limited because there's only so many vehicles you can get on and off the roundabout. I do have a few more interchanges in my pipeline, based more on the Y branching idea, that was my last roundabout-based one... I think.

One more thing, I just read your Optimal Square Grid guide (https://sp.zhabite.com/sharedfiles/filedetails/?id=2035626231) . I'm a big fan of city grids and that was just an excellent read
me22ca 12 Sep, 2020 @ 4:38pm 
Very pretty work once again, Rich!

(Not that I'd personally use it, since I don't think there's ever a good reason to have 6 highways run join like this, and even with TMPE I don't find roundabout-based interchanges have good enough throughput to be used for system interchanges. I think for this I'd just put a Y in the middle, then a Y on each branch of it, with a bit of merging space, rather than fight with the merging on the roundabout.)