There is a version of diverging diamond that doesn't use traffic lights, "double crossover merging interchange" (DCMI). It solves this by adding more bridges, so Im amazed you didn't know of it.

20:26 ‘Biffa I need you to fix my city please…’ Too real

This was a real architect move, right there. Eliminating a free flowing interchange in exchange for traffic lights while the shit runs downhill. 😂

"way more examples of like some realistic stuff" The plane in the background falling out of the sky 💀

DDI is generally best for a slow moving road interchanging with a faster moving highway. The biggest advantage of it is that you can take a pre-existing diamond interchange and convert it into a DDI while barely having to change anything at all. On a slow moving surface road or even on an overpass, the crossovers can be plopped right down on the original roadway, and the guts of the traffic lights are already there, they just have to be shifted around a bit. You don't have to lay down any new road. What often happens is they build a higher barrier between the two sides of the road where they're flipped, because it messes people up when they see themselves on the "wrong side", and they feel more comfortable if there's something that prevents them from seeing the opposing traffic.

RCE: "Oh, no, we've poo-lluted the river!" Me: Yeah, sounds like Britain, all right.

There is a diverging diamond near me. All it has managed to do is make traffic in the area worse, as the planners decided that, for some reason, they needed to combine it with a freeway entrance/exit at a point where a divided road loses its median and gains a left turn lane. The number of near misses that have occurred at it since it's completion in 2019 is insane.

Road-nado is a piece of architecture. Just thought I’d toss that out there. However, “trumpet” intersections are a legit workhorse of an intersection. They are simple, take up less space, and they just work.

Clearly you need a fractal diamond interchange. A diverging diamond made of diverging diamonds. Send traffic into basically every direction possible, and maybe a few that aren't. Need to park near the footpaths to the pedestrian zone? Take the fractal diamond. How about shopping in downtown? Fractal diamond! Need to dive to the depths of the new lake of poo? Fractal diamond! Clip through reality to get your car up to the great draft table in the sky? Fractal diamond!

I remember when they added a DDI in Anchorage, Alaska. A lot of people thought it would cause more accidents and traffic. The reality is that traffic collisions and traffic congestion dropped considerably.

2:01 the fact that you were actually able to find a potato in the same shape

As someone who has to drive through one daily, let me just say "Fuck the Diverging Diamond with a spiky metal pole." Not only does it never cease to be vaguely unpleasant having to drive on the wrong side of the median, but multiple times a year some yahoo drives through the wrong side and there's a head-on collision.

one of the problems with the DDI is when the engineers decide to put it in with 90 degree turns on the on-ramps and expect people coming from the bridge to go full speed and the people who have to slow WAY DOWN to make a 90 degree turn, to merge seamlessly.

0:35-0:37 Plane was stalling and about to crash and at 2:24 it was very close to the ground. Great video!

We have one of these in Michigan however its a tiny bit different... the helix portion of the road is "16 mile road" a major surface road and the straight through portion is the Highway "I-75". It helps woth congestion a TON especially because you no longer need to get off the highway and do a "Michigan Left" to go the direction you wanted to go, now instead if you want to go west its super easy to just go west instead of east then turning around west.

Phoenix, Az installed one of these not too long ago. absolutely hate them. As a result of the angle of the x and the placement of the lights on the opposite side of the intersection from the line you stop at; when a driver is proceeding through the first light, they can, in their periphery see the red light stopping the oncoming traffic. The result is many people hesitating mid intersection, which intern causes a minor hiccup in traffic that gradually gets worse to the point of stopped traffic. Happy Valley road and the I-17 for those interested in looking at it in maps. the placement of the lights is the real cause of the problem. city skylines puts lights on the corners right on the stop line so its less of an issue. Additionally because the one in phoenix has frontage roads. So additional roads need to be connected into it which is messy, adds an additional set of lights, and exacerbates the problem.

Looking at the grade separated junction reminded me of a construction of one of these near my home when I was growing up. It was part of a busy intersection and they had decided to "upgraded" it. They had 3 severe accidents on it within the first week of opening due to a blind spot x)

We have one of these maybe near where I live and it is a nightmare since there is a NHS(Asian equivalent) near it and and an intersection not 500m from it. Cars that just got off the highway immediately had to slow down since people had parked on the side of the road (NHS parking overflow) and people struggle at the intersection where just no one would follow traffic rules

My first thought when seeing you connect up the slip roads is that some of those stoplights can only fit like 3 cars before it backs up across the exit. Also, unless shown ironclad empirical evidence to the contrary, there is no situation in which I will ever believe that a design with stop lights is better than one without, when highway speeds are involved (and there is basically unlimited space)

New diverging diamond is being constructed in my little city IRL. I hope they actually do it correctly and don't try to reinvent things the way they usually do -.-

Loving The Suspicious Shape Road Layouts You Build 😅

Looking how chaotic engitopia is, having a realistic intersection is really chaotic

I live in Calgary Alberta. We have the first one of these DDI ever built in all of Canada. Drive through it on a regular basis. It works well and as far as traffic goes it does seem to help. I was there for the opening ceremony when it was officially finished and opened for all traffic. Remarkable engineering.

On the diverging diamond interchange could you not make a small bridge at each end and get rid of the traffic lights making it even more efficient. As the only reason for the lights is for lanes to cross. Make it a bridge instead

i love your cities skylines 2 videos, thank you for still making them

The university I went to put in one of those diverging diamonds near the apartment where I lived. It was great once they FINALLY finished construction! Especially when you're the one needing to turn!

they just built a diverging Dimond near my city and the only reason i knew what to do on it was because of one of your other videos that you made one. thx

Nothing better than to come back from school with RCE

They did this recently in my area and the highway runs over the arterial, so the arterial has the stop lights going under the overpass

There’s a DDI near my apartment and I absolutely love it. Being able to turn left (in America, right in Britain) onto the highway without crossing traffic is beautiful. But my parents hate it whenever they come to town.

i actually really enjoy seeing the different traffic paterns and enterchanges. I would love to see a city exploring ALL the different types of roadways and intersections.

There should be a hydro dam at both ends of the poo-canal, and of course, a ferry line for sight seeing architects. Additionally, you poo moat should completely surround the poo-cano.

My town has the exact set up as the thumbnail photo. Everyone hates driving on that overpass. It has several stoplights that are at confusion angles and it is unclear where the line to stop is at.

Where I live we had a DDI installed at our most problematic freeway entrance about 5 years ago. Traffic in that area is a night and day difference. While the road is still always full of cars, there are rarely ever traffic jams, and accidents at that intersection almost never happen anymore.

About a decade ago, the major US Interstate exit junction for my hometown switched to a diverging diamond. It definitely improved traffic exiting the Interstate.

Thanks for the new cities skylines videos, i always enjoy them

In my town, we have a ddi planned at a major highway/interstate junction. It will be the first in a 500k metro. Part of the project is replacing the bridges and that’s underway. The ddi hasn’t been approved yet cus the county is worried drivers will get too confused. 😂

Dag Kurt, dank voor de mooie video over dit product! Garantie wordt 15 jaar ten aanzien van de 10 jaar bij de huidige 5kwh variant. Let op 4 torens parallel is alleen mogelijk op de 12 tot 25ktl-MB0 vanwege 2 batterij aansluitingen

I think the point of the DDI that may be lost on the audience is that it's a great interchange when the traffic going from one highway to another is higher than the traffic traveling through in the same direction. It allows for more merging traffic.

One of the small cities near me did the diverging diamond setup about 5 years ago as a test. The exits now back up onto the highway almost daily and cause accidents at least once per week. It use to never back up to the highway. Stupid idea.

"Oh, I'm liking the cable-stayed ones" Sounds a bit like...an architect 🤫

But why have crossovers before and after the bridge, and why have them on the same level? "Here is a design intended to speed up traffic by eliminating stoppages, so let's put in some unnecessary stoppages!"

This was my favourite episode of this game so far and I’ve watched most of the ones from about now to two years ago

'Maybe I should build a second one, idk' Me: Only 2?....build 10.

We have one of these near my old uni (just with the crossroads under the main highway) 😁 as an engineer myself, I got excited.

I have been waiting so long I'm so glad for more Cities Skylines 2 not saying I did not enjoy the other games but this series is my fav

A DDI is far less efficient than the Turbine. It also really only works when the thru traffic over the interchange is very small compared to those coming on and of the freeway. Living in a state in the USA that built some of the first, they are also very inelastic and fail quickly at capacity.

You should upgrade the bridges to three lane motorways, because if the traffic is building up to much, it will block the cars which want to turn right causing a much quicker build up and block the other side of this junction. With three lanes this conflict should be reduced, because the sliplane is less likely being blocked.

A DDI is a service interchange, where for connecting two freeways you should be looking at system interchanges

The best thing about diverging diamonds is how much safer they are. Efficiency is cool, but safety is always number one.

16:41 as a brit you should know to never trust truss 🤣

Watching this video I had a realization that I know of a DDI in real life. Pretty cool. I can't believe I didn't connect the dots before considering this can't be the first time RCE has explained this intersection in a video.

I drive on one of these every day on my way to work. It is surprisingly painless

I love diverging diamonds, but they cause a lot of headaches for people not familiar with them. It's so easy though, you literally just follow the lanes.

We actually have one of these where I live, its interesting to watch it work!

FINALLY A NEW CITY VID

There’s one of these in a town near where I live. It is universally hated by all locals. It’s a pain to navigate

We just had a Diverging Diamond Roadway implemented in my city in Oklahoma. Just seen a video on it functioning and its neat! Its on the underside of an interchange on the general roadway. so same concept but reversed

I lived in a U.S. city that has a diverging diamond. it worked really well and from what I understand reduces the chance of traffic collisions drastically.

I always have the same burning question. It looks quite tight in some bits for big CE lorry's. Might be interesting as a video idea to make one more lorry friendly.

We actually have this on where i live here in california, when you exit the freeway. I was so confused at first

Hello There! I have a fan request for you! Basically it’s making a City on a mountain, the inspiration for this request is Mount Olympus from Greek mythology, and you could search up Greek mythology, just in case you haven’t heard about Mount Olympus, plus (I’m not sure about this, But) I heard that there is a sandbox mode and has infinite money, sense I’ve seen that you had trouble with money, so if you don’t want it to happen again, sandbox mode maybe your best choice, sense I want you to make a large population of at least 500,000 - 1,000,000 people which could be you goal in this video, might take a while but it would be manageable hope you make it!

Before i started this video i was like “he should do the diverging diamond like the one built in my town” and boom, you do it lmao

They added a few of these in Utah when I lived there, it was CHAOS! Definitely the worst drivers I've encountered anyway, and this just threw them for a loop.

Driving through these is actually quite easy. And I would say much faster than you would think it would be. The one I was in had the highway passing under the diamond, so the diamond serviced the main artery road that was already controlled by traffic lights up and down both sides and slower speeds. So the two intersections on both sides of the diamond didn't slow anything down. But I would argue like any big intersection, just follow the signs and you'll be through it and on your way in no time. They handled bigger trucks very well as well, getting them on and off the highway without congesting the lights up too much with cross over traffic. Just having them on the side of the road as the on ramp, got them on the highway so much faster.

We have one of these in Colorado Springs CO USA and it gets a lot of complaints. But it has cured a terrible backup/accident area.

Take a look at the I-96 and US-131 interchange. It's like a variant of the diverging diamond but with no traffic lights. It's in Grand Rapids, MI, USA

A bit down the road from where I (sadly) live, Glades Road and I95 in Boca Raton, FL... this diverging diamond exists... it's absurd and I'm not certain it is better than what it replaced.

Yizez!! that's one a complicated motorway... well diaminds are though arent they LOL

DDI, also known as was Dance, Dance Intervention *Stars break dancing* ✨Matt you have a problem ✨

i pass through a DDI every day i go to class, it never ceases to amuse me when i have to drive on the "wrong" side of the road lol

That turbo roundabout using 2 lanes everywhere makes it so confusing, i mean, if you google turbo roundabout, they look much simplified as they dont use that much lanes, making it much less confusing and i guess more efficient, the one in 20:44 is just a creation of an Architect

They put one in kinda nearby me in Missouri and it was terrifying the first time going through. Felt so wrong lol. Now it's fine and fun to go through

Brilliant work Matt

this is art

“Stop what you’re doing babe, a new Engitwopia video just dropped”

It’s funny we actually have a few of these here in south west Florida. They’re building another one in my current city of fort Myers

The diverging diamond, an intersection where you have a chance to momentarily drive on the wrong side of the road

The turbo roundabout spot is screaming for SPUI.

Its time for you to do the 1 mil population challenge!

Love your videos bro

I always thought diverging diamonds had more bridges instead of traffic lights

We have on in the prairies, on Highway 1 in Saskatchewan near Regina!

Could you put a yield instead of traffic lights that makes the people on the bridge stop for the people coming off the freeway

We are getting one of these here in Tulsa! The DDI, not the poo river... The mythical River Stynx does not flow through our area. No architects here.

14:45 and here I thought the name of that engineering marvel was "Dysentery Bridge"...

the best of my morning 🥰

Diversion means fun in Spanish. Never thought of that before. When we have fun, we're diverted from more important things. And I don't even think this wasn't on purpose.

For the diamond, change the crossover intersections, into over-unders. No lights needed.

I demand more skyscrapers forests as the Architect 😂

I remember them doing this on the busiest intersection/on ramp road in my home town. God their engineering. Still busy af but never backed up like years past.

love me some cities skylines content 🔥

I had an epiphany while watching this and realized I use one of these quite often when going to visit my in laws

Finally he has some traffic on the correct side of the road.

17:21 Missed chance to give the bridge a duece in its review

this was actually built in my home town in the last 5 years!

I´d really like to see any interchange from germany. There´s many really efficient ones, for example there´s one on the A20 as efficient engineered as a turbine interchange, but the straight roads are on bridges on top, instead of the arms, which go below (might be a pleasing swap for your architected turbo roundabout, which you really failed to build...).

Absolutely lost it at bridge re-poo 😂😂😂

"If you're asking that... well done! you got a bit of engineering wisdom in you"... Thanks for the most positive compliment I've gotten in days

More experimental round about plz! 🥹✨🙇🏼‍♂️