I just want to thank YUMBL for these videos. They are educational and entertaining. There's something really calm and wholesome about the commentary. I find them really relaxing and give me great vibes. I enjoy every upload. And they always get me loading Skylines back up to quickly try out each build myself.
Intersections, lanes, dealing with traffic and finding clever solutions is literally the whole reason I play cities skylines. I'm so glad there's now a youtuber who has such a good and precise focus on that. Have you considered doing "traffic fixes" for people's maps/cities? I know other youtubers do that but honestly I never really like how they do it, very unrealistically or lazily. Yours I would actually want to watch
Very well said, especially the lazy part. Throw a roundabout at it is always the answer in most cases, which i cant stand especially when its like 2 lanes feeding 4 or some stupid similar thing and only half the lanes actually are used. I love this guy's vids
What i love about this interchange is that there is no wasted space. If you want, you could expand out the “off-ramps” to leave more space in the middle for an office park with service roads going under the same overpass
Could probably add a slip lane inside the unused area for double right turning traffic if needed. Same for the traffic coming from the north turning right, slip lane just along the highway. Means you can dedicate the lanes in the roundabout to suit the traffic flow.
We have one of these near me! The intersection of PCH and Alameda has O St functioning as the little quarter-clo. That intersection handles a lot of port traffic, and I always thought it was an interesting way to make a left turn there.
Is that "E O St."? And how many unconnected pieces does that street consist of? Looks pretty wild on the map. (And "E Colon St."? At least it's not "E Coli" ...)
yumbl is the Bob Ross of Cities: Skylines - even though I haven't started the game in a couple of months I still love watching these videos as they are super relaxing.
Often when city builders are talking about realism when building an intersection and cutting cost, they seldom mention the cost of operating a traffic light. I don't know how much it costs to build and operate a traffic light, but I suspect that in many areas there might not be power available in close proximity or it is quite difficult/expensive to operate them. Also, what happens to the traffic if the power is out? Not really a problem in Cities Skyline, but it is something that could happen in real life. Those aspects makes me favor using more round-a-bouts in my cities, and why I really like the last design that you made.
If it comes to that point, should’ve prioritize walkability, bike infrastructure, other public transportation options. Obviously, zoning and layout and prioritizing accessibility are factors as well. The US has outdated infrastructure.
This style of interchange isn't particularly efficient, but it vastly improves the safety of two high speed roads crossing. Through traffic can continue at speed, as they don't have to contend with other traffic travelling at speed, and the only intersections are T junctions. It's well suited for rural areas where a larger interchange is not justified by traffic volume.
Well, efficiency and safety aren't generally possible in a small space. On the efficiency-safety-space triangle, you can only maximise one, or share two. Throw in bicycles and/or pedestrians, and a lot of efficient junctions are horrific.
This is a real good solution to a problem that does exist. Our city has a highway interchange that exited onto the city’s Main Street and was creating huge problems because of left turns. The DOT and city redesigned the Main Street intersection to move the left turns between 300-500 feet in all directions using U-Turns. The traffic flows much better three years removed from the construction.
"If it doesn't work as a roundabout, or it doesn't work as a light... feel free to build a bridge." (And get over it!) Sorry that was going through my head as you said that and I needed to put that out. I'll try this in my next build but I rarely use six-lane roads as highways. Thanks for your time in helping us out in our city builds.
Nice shout-out by Biffa in a recent post. He looked at this presentation, and included an example in Missippatea, of course crediting you. He was very pleased with how it splved the flow issue he was looking at.
Very nice video!! I love all the solutions. There is a lot of struggling creating interchanges in cities skylines when you're playing with money limitations and very often simplest is better. Thank you for the advices!
Havent really been through the video yet, but judging by the thumbnail, this is my coming home. When playing cities skylines and dealing with traffic my biggest priority is to keep things realistic and not demolish entire rows of houses for a bigger intersection/interchange. So i often find myself building exactly that. Just make one road a bridge and upgrade/ connect a nearby street to be the connecting. Or as in a recent case, where the intersection was right on the quay i made a little bridging part over the water.
Take a look at the road layout and structure of the Netherlands, what you're describing here (and in few of your other videos) is used quite a lot in the area I live. Look for Flevoland (Province). Maybe there's something interesting to take from it as well for a next video.
Hey YUMBL I used this concept to upgrade a normal roundabout to a system similar to this, independent sides being held in a unified medium. By adding an over/underpass straight through and turning the roundabout into a 2 way system it acts as following: - Phase 1: all sides enter the interchange at the same time - Phase 2: all sides exit the interchange at the same time It works excellently on the interchange testing map and I'd be happy to share in-depth screenshots.
YUMBL's setup are a real addition for every city planner - be it Cities Skylines or IRL. I was amazed on how well the displaced intersections in this episode handle the same amount of traffic (since same test map) even better than turbo accelerated (enlighted) roundabouts in the last one. But let's be honest, especially here in Europe when time comes to change from at grade intersections two such displaced ones houses are already built up too close. This setup only works well if the ramp in between buffers enough vehicles for a complete traffic light phase at a time. Btw @YUMBLtv , have you ever tried to de-couple those two timed traffic lights completely? In my cities where there are always asymmetrical flow rates I get optimised cycles by autonomous but still timed setups.
Have one near my house! Added benefit for the railroad line that goes underneath the overpass as well, providing the only non grade crossing route for that side of town.
As a novice I'm finding a lot of little tidbits in your videos. For example I didn't know that lights at more than one intersection could be synchronized. Thank you Yumbl.
Am I the only person who *doesn't* want to know what people look like? From RU-vidrs (Kibitz, YUMBL) to comedians (Eddie Izzard, John Mulaney) to singers (Disturbed, Tool, Slipknot), I love not knowing what they actually look like. There's something about the simplicity of their voice alone that I really enjoy. And I really love YUMBL's voice when he's explaining things. It's very zen and relaxing to me.
There is an interchange exactly like this near where I used to live except it also had an on-ramp so that one direction of straight-through traffic never had to stop and convert the interchange into a two-phase light on the busiest road. Imperial Highway and Orangethorpe Avenue if anyone is interested. Along Orangethorpe Avenue there are several more of these quadrant interchanges in order to remove crossings for the train track that carries both cargo trains and the metro link service in LA run right alongside the avenue. Cool to see it demonstrated in the game as well.
Thanks for this video, man. I have many times come into this situation where two roads ended up becoming sort of major ones and the overpass was just a partial solution. (sometimes I created some weird "creatures" to try to fix it, but never very much seccessfully lol)
Could be made a little more efficient. When you have a "T" intersection, the thru lane on the top of the T can be made constant green. The left turn onto the main highway can be forced to the two inner lanes and the outer lane can just constantly keep going. We have those here where I live.
The thing nobody ever seems to discuss in these intersection videos is that sometimes the intersection you want to upgrade isn't the problem. You really have to look at where cars are coming from and where they're going before deciding to fix an intersection. You just might find out that tweaking something elsewhere on the map solves the problem.
I know of one of these in Santa Clarita, CA! Golden Valley Road bridges way high above Soledad Canyon Road, so to connect them, they have one of these. Seriously simple but it’s definitely effective for connecting them.
I have been pretty successful at building mini parclos and cloverleaf intersections in cities I have made. I usually use small streets built into sub blocks so as to not lose use of the space inside the intersection. Basically, what would be the ramps, just loop around the buildings that face the main street. Instead of building overpasses, i use an underpass and retaining walls to minimize lost space. I have one city that i call basket weave city because all of the larger roads alternative underpasses. So every other block there is an underpass going one way then an underpass going the other way.
This thing kills traffic and yet it is so simple. I just noticed that one of the federal highways near my town uses this exact same setup 5-6 times in a row on the way to the next town.
I made some of these in my city, with only a simple 1-lane each way connecting each of all 4 quadrants. They use even less space than these you built, connect two 6-lane arterials, have exclusively right turns, ALL of which are completely unrestricted with no signals or even a single yield sign. You say the "interchange" gets too big when you use 2 or 4 quadrants, but it doesn't have to! These interchanges in my city literally EAT the traffic for breakfast. Kind of bummed you didn't actually demo the 4-way version of this and what it can actually handle...These intersections are truly a game-changer in this game, especially if you have traffic de-spawning turned off in TMPE!!!
In some of the Tropico games, there was a bug where you could build roads that overlap but not intersect. I found that doing that and putting in the one simple connection helped traffic a lot. I'd then put in the 2nd (opposite) one and it would really flow nicely. Adding the full clover didn't help, and just took space.
As a planner, I like solutions that think outside the box and think in the way of economic sustainability. This one quadrant interchange is a very nice real world solution, which not only can be safer, smoother but also economically effective, which could make a big deal in the real world. Thanks for it! One idea: make every line with another color (if line mathematics), general audiences would read it better...
The roundabouts at the end look similar to a dumbbell interchange, but the roundabouts are on both highways. Looks like 2 right turn slip lanes could be added close to the bridge to avoid the north/south highway from going through both roundabouts.
Thanks for taking your time researching and experimenting and of course showing it to us! Speaking of magic roundabout in Swindon, real life has some amazing and surprisingly so infrastructure hidden in plain sight, sometimes.
I know this interchange is not very efficient for free flowing traffic, but it would be taking a safety focus. It would be great for downtown areas of a city, or even just to reduce conflict points on an at grade interchange 😊
We actually a similar interchange in my city (Bahía Blanca, Argentina). The only difference it´s that it covers two cuadrants, so that there is no lane crossing on the above road. Good content, as always.
I love these sorts of solutions. There are a few roundabout-based interchanges near me, and they're not always successful, but at least they're fun. I don't know if this is intentional, but in those roundabouts at the end, it looks like traffic in the circle is yielding to traffic entering. That seems really awkward. For example, on the right-hand side at 16:50, it looks like there'd be a major pile-up when the green truck starts moving and cuts off the flowing traffic.
Excellent! You're providing quite the education to us builders and it goes to show there's a lot more than just intersecting a couple of roads! Great music choices, too!!
Nice and practical video as always. You deserve the title CS interchange wizard. A humble suggestion. Can you make a video or videos about roads packs, recomendations, uses, etc. I see a video in your collection but a lot has changed from that time. Thanks.
I really enjoyed this. Looking at the result at ~ 11:50, I think a 2+4 road leading onto the larger road would be even better as then there'd be 2 lanes going both left and right at the end (onto the two lanes they've got)
If you added an additional lane on the outside of the interchange for left-turning traffic, you could keep the through traffic moving continuously. As it currently is, you have two lanes through and two left. You could either make this one through and one left using the same number of lanes on the main road (the simplest option), or two through and one left, increasing the main road by one lane, or even two through and two left, increasing the main road by two lanes. Either way, it would mean that traffic passing on the outside of the junction on both main roads would never have to stop at the light. You should be able to do a similar thing with a right followed by another right. Provide the appropriate number of lanes and traffic need never stop. This would massively improve throughput in two directions on both roads I believe that should mean that those who require a left turn are the only ones who ever need to stop at a light.
If..... Increase the bridge height enough to get a ped/bike bridge in-between Level the intersections to their respective underpass/overpass Selectively replace bermed sections with bridges/viaducts A really high quality ped/bike network that doesn't directly interact with the road network could be threaded through that, possibly with connections to public transit.
They've recently put in the "Opportunity Corridor" in Cleveland, Ohio that now has a quadrant intersection for the end of I-490, meeting East 55th and the Opportunity Corridor. I think they're very cool!
I have noticed that for the 2-quardant interchange, you can go down to 2-phase lights, if you only allow left turns off the ramp (or only left turns onto the ramp) instead of designating one of the roads the main road. The version with left turns off the ramps has the advantage that you can also make it work with give ways and remove the traffic lights. Speaking of lights, do you really need to link the traffic lights on the ends of the jughandle(s)? For the 1-quadrant interchange, how much sense would it make to add the 3 missing right turn slip lanes? I would assume you can't go down to a 2-phase light. You claim that it would take a lot of space, but you can keep them quite close to the main road (3u or 4u spacing). Too bad that this interchange just eats the traffic of the intersection test map, otherwise it would be possible to test how much of a difference they make.
Despite the flaws of diamond interchange, It achieves it's purpose. Which is, letting the through traffic go without stopping at all. But this one doesn't have that main feature. If you're gonna stop or slow down through traffic, just make it a roundabout.
At the end, for pure curiosity I would have put in a slip road for the right turning traffic. So they wouldn't need to stop for the round-a-bouts and be free flowing. Depending on where the traffic is mainly travelling this wouldn't have any benefits but it could help loads.
Wow！ It is my first time to see YUMBL real person ！I like your mods and road intersection tutorial，thanks to you to make CSL more interesting， have a nice day。
This interchange reminds me of Alexander, NY. This is not quite like the interchange between US 20 and NY 98. Alexander’s interchange is righthand turns on and off US 20.
@@YUMBL I was suggesting them on the single connecting road, would turn the lights too 2 phase at the least and shouldnt take up more room than is already taken
With only one quadrant, this interchange cannot be used for a U-turn. I know an interchange is not intended for that, but most have that added benefit.
I wonder though if instead of an overpass, would a tunnel be better because you could move your junctions significantly closer? Reducing space needs significantly and having the same efficiency?
17:00 - One more bypass lane to prevent right-turning traffic from having to enter the circle at all would really streamline the process. And realistically a simple right-turning lane off the bridge could remove a full 10% of the traffic in the entire interchange
Could you make a video on roundabouts with trafic lights in Warsaw? For example ONZ roundabout? I'm very curious how it works and how would you build it
If we remove the assumption that the two main roads must be grade separated from each other, that opens up further interchange possibilities. While they wouldn't be used on freeways (due to the at-grade intersection), they could be used when two busy streets intersect. The Echelon interchange is probably the best of the at-grade interchanges.
if you added a right turning slip lane on the other 3 quadrants, they will not take a lot of space, since they can kiss the roads, but they will save so much traffic.
Please upload your works of art (because that's what they are!) to the steam workshop, I can't make something this beautiful, I am not you! Also, you're awesome. May the traffic be forever in your favor (and not in your lane!)
Another question from me. Sorry for bambarding you - I've just discovered your channels: Your selection of roads look so much better organised than mine (see for example at 4:41). What mod do you use to order them like this? Mine are filed into small roads, larger roads, highways etc but how roads are split within those headings seems a bit random and it makes it take forever to find the correct layout.
