Traffic flow measured for 25 different intersections in Cities Skylines 2022

In this video I have measured the traffic flow for 25 different intersections in Cities Skylines. They are presented in order from poor to best in performance.

Traffic is measured per game week as vehicles per week (vpw) and presented both in text as a maximum and an average value over 10 game weeks and as a bar chart showing vehicles in, out and in transit in the intersection.

Performance is measured as the accumulated vehicle count leaving the intersections divided by accumulated vehicle count entering the intersection. There is as well information on cost to place intersection/roads and square size of the intersection in squ (u is the unit of measurement in the game).

The score is calculated so it accounts also for cost and size. Read more in detail on the blog of the test setup and full results from the test plus loads of tips to manage traffic in Cities Skylines to make your city run perfect!

Check the blog post with more detailed information at

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[thefalkgamehub]

Let me know in the comments if you would like to see more intersections tested and which ones!

[ShawFujikawa]

Now this is the scientific approach to interchange testing that I’ve really wanted to see! You actually went through the effort of stockpiling vehicles to completely saturate the interchange, though I still wish there was a mod that allowed you to do it for the entire duration of the test. Even the heaviest dummy traffic doesn’t come close. I think separating the different interchanges into regular, service and highway groups would also be good for comparing ones intended for the same purpose.

For interchange suggestions:
SPUI
DCMI
Turbo Roundabout
Traffic Circle
Continuous Flow
Contraflow Left
Parclo Bypass
Twisted Cloverleaf
Diverging Windmill
Double Trumpet
Double Diamond
Cyclone
Basketweave
Paperclip

[DanimalUpchurch]

Amazing! Would love to see more of this, intersections and interchanges of all types

[waterslide-et]

0:06 large roundabout
1:13 4 way & six lane intersection
2:30 cloverleaf
3:27 small roundabout
5:42 4 way & 6 lane intersection (timed traffic light)
6:49 large roundabout (r88)
7:56 4 way & 6 lane intersection
9:03 diverging diamond (traffic light)
10:10 single point urban partial cloverleaf interchange
11:17 roundabout partial cloverleaf
12:23 single point urban partial cloverleaf interchange
13:30 diverging diamond interchange (timed traffic light)
14:37 4 way over-and underpass (timed traffic light)
15:44 cloverstack
16:51 4 way over-and underpass
17:59 4 floor interchange
19:03 roundabout with over & underpass
20:11 cloverleaf
21:19 cloverstack
22:25 4 floor interchange
23:33 windmill
24:39 turbine
26:55 pinavia

[damiencarreras]

Can we have a compilation of the best intersection concepts? Great video, I appreciate the time you take to experiment

[RedSntDK]

Oh dear, that spupclo could definitely use some sliplanes, that 115° right turn looks rough.

[ctrlaltdebug]

For the better performing interchanges, it seems that as the weeks went by, they ran out of traffic so that the later weeks had low counts.

[pickleman]

6:14 should have right turn on red, all directions at all times.

[princekamoro]

I would like to see breaking points tested. That is, there must be a certain level of traffic demand that produces peak throughput. And if you feed it even more traffic, the junction breaks, and throughput actually decreases rather than merely leveling off.

For example, I believe the junctions at the may have been operating well past their breaking points.

[artemKonoplevGeo]

(добавил через сутки). Ааааа, "гладко было на бумаге(в компуктерной модельке), да забыли про овраги". Водоотведение! Это я вспомнил в Красноярске копыловский мост над ж.д. путями и потом развязка, и там есть "нырок" поперечной дороги. Его не топило, но это значит просчитанная "ливнёвка"(дожди, стаявший снег).
Если же нет, то будут топить варианты с туннелями. Или они дороже будут - чтобы не затопило.

Круть, нормуль моделирование. В жизни был на простых пересечениях, перекрёстках, кольцо и "клевер".

[mcmudkipp]

Solid video. However things weren't set up properly (with tmpe) on some occasions vehicles were jumping two lanes to get to on ramps/offramps

[johnterpack]

Something strange is going on. Watching the cloverleaf, not a single car turned right at any point. And hardly any went straight through.

[azuarc]

So what you're saying is that if I play without traffic manager, I need to put turbines everywhere.

[RapeephatYakza]

WoW! How do you counting vehicles bro? It very useful if I can count vehicle in any intersection. 🤩💯💯💯

[LandonW]

Noce work i cant imagne how long this took