Heya, developer of the game here! Unfortunately the game has some inconsistencies between amd/intel processors at the moment, I swear my solution for Giga worked on my system! I'm doing my best to get this fixed or at least make the level not as tempermental but I am just 1 person working on this in my spare time so please be understanding. As always, a huge thanks to RCE. Thanks to his coverage I'll be able to get GridRoad out on steam early access and potentially make a career of this.

Put the traffic lights one step back so it's not exactly at the corner of the roundabout. Gives room for some of those cars that overshoot the light.

I'm pretty sure in a roundabout you want all the lights on roughly the *same* phase, since they'll naturally be evenly spaced when they enter. Then just give enough time for the cars to mostly leave the roundabout

Watching Matt work out that on roundabouts, outside lane turns off only rather than turn off or continue around .... it's like watching someone getting eaten alive by friendly rabbits.

On the squareabout you should have the traffic lights "spin" in the opposite direction of the roundabout, so cars don't merge on the same lane at the same time, and instead they go in behind one another. So for example from 14:14 to 14:54 instead of counting down from 1 to 4 you should count down from 4 to 1, like you did it at 17:11.

He’s going to be an architect again isn’t he?

11:01 "What would I do in Freeways?" *strongest shape flashback* I cried

On every arm, one color of car could make a direct left-turn without ever entering the roundabout, maybe that would be enough to fix this.

Can you move the stop lights back one square coming onto the roundabout? It may create a box to avoid the collisions.

Watching Matt work through the second puzzle without realizing that some colors have to cut across lanes and others don't

There is a newer version of this game currently, with 8 levels total, would love to see you try out those new levels!

One of my favorite channels to find cool new puzzle games based on traffic. idk why it feels satisfying to fix traffic flow, but dang do i love doing it.

20:23 You had the right idea with the turn-only exits, but forgot to apply it to every side.

Older video, I know, but two considerations for you anyways: 1. The longest journey a car has to make (going right when the roundabout is clockwise) is about 3 times as long, and ideally, everyone wanting to go on the round about yields (forcibly with traffic lights). Thus, I almost think 4 seconds on (1 for each input on a side), 2 seconds all red. This would give 3 seconds for every car to make their journey at least. (With maybe the addition you had of the 5th and 6th lanes.) 2. To stop that death trap of cutting off an input, the outer ring should really be an off lane that begins after a small gap between it and the traffic lights. Hopefully I conveyed that well! Makes me want to get the game and try these ideas myself.

move the roundabout more to the middle, which gives room for slip roads. So the grey cars can immediately exit without merging with anyone. And get an AMD machine it seems :D

I realized today that I am also RCE because i am a Real CAD Engineer. Made my day!

Im not an engineer but i did stay at a holiday in last night. One thing that might help is have cars making a simple left avoid the squareabout entirely.

It's almost like he hasn't driven on roads sometimes, lol. You might try adding some brief periods of all reds to clear out the intersections. That's how pretty much every traffic light works. I guess maybe he's just not used to them though with roundabouts everywhere.

U should try slip-lanes to prevent one colour from each side to enter the squareabout

You know, the way the Mega Roundabout in Swindon works, each contributing road has a three way normal roundabout, and together they form one huge backwards roundabout. Maybe that's how you should have done Giga? Also, you live practically next door to Swindon and I have entire oceans in the way, so real architect behavior on your end tbh

Slip lanes ( filter Lines in the U.K.) before the square about. One between each parallel set of roads. one around the corner near the high score box. An exit lane on the outside for blue cars will get them off of the square about sooner. Near the controls and giga title, you can move the entrance over three to the right I don't know if this will help. I have tried none of this I am just an armchair designer.

I think having 'offramps' at the edge of the circles will help cars cut that final corner better. (The opposite of the ones you did in the first circle)

En el último nivel no tienes que poner tantos carriles, ya que sea como sea van a tener que salir por 1 solo carril. Por tanto, si poner muchos carriles en medio, se acumulan. Debes poner 1 o 2 carriles, ya que de esta forma tardan más en llegar pero lo hacen de manera continuada y no se saturan las salidas.

I think on the giga level you just need to remove the straight through options on the first turns. You were getting your crashes there so you migbt turn those into jaut lefts instead of straight lefts.

I have a solution I use in Cities Skylines for very busy multi-lane roundabouts; I wonder how it'd work here. Basically, All the roundabout junctions are lighted. All lights on all junctions inside the roundabout are green EXCEPT for 1, which is red. For that one red light, the arm is green to allow cars in. On each phase, the next light going COUNTER to the flow of traffic goes red for the roundabout and green for the arm, the rest of the arms are red and the rest of the roundabout is green. IOW, the roundabout always only lets one arm on at once. The roundabout is always free-flowing except for the arm which is currently green.

Sneaky yellow cars at 15:09 that go around the traffic light on the upper left road 😲

I do like the concept for this game and the mechanics, but hot damn they gotta do some bug fixes or something with the driving algo when it comes to those crashes. Either way great vid and glad the developer watches the vids.

What if i told you this is a railroad solution and the actual way to do this is lock 2 outside lanes to the outside instead of only 1 locked, and force the upper lane of the 2 locked to merge onto the bottom AFTER the bottom one merges to the first drop off which forces more cars to use the inner lanes towards the middle while 2 of your lanes are drop off, 5 of them are merging; which the merging was fine as long as the cars could get to each peice. Also you could just put 1 of 12 ticks red light in inner lanes just after each merge to allow for oncoming traffic.

Something I noticed was that they always crash when one car is trying to get out into the outer lane to turn next intersection. If you made the two outer lanes both turn lanes, the very outer lane should only be used by cars that are entering and turning on the first exit. I would also make the roundabout smaller like you had in the beginning and give cars that are exiting on the first exit a separate road so they never have to enter the roundabout

Great video. 😊 you have more cars going into the circle (16) than going out (8). You need to make as big of circle as possible then stager each pair so only 8 cars enter at a time. Try that. 😊

Put a slip road between each adjacent on/off road to allow particular coloured cars to skip the round about entirely. So Aqua, grey, red and yellow flags could have a slip road on the edge of the map to bypass the squareabout entirely, reducing traffic in the squareabout. Set traffic flow to only be allowed from the nearest lane.

5:00 what you could do is build a slip lane for those we only need 1 turn. Take them around the squerabout.

Good on the editor, and RCE for pointing out his mistake and anticipating the backlash. And then posting said backlash, letting people know that constructive criticism is still valuable

Total guess as to a way you can beat Giga, is you could cut out some road right where the merge is happening, forcing oncoming traffic to maintain outer lanes until just after the turn onto the roundabout. That might *might* prevent crashes right at the exit of the lights

In the Giga Roundabout. In the top ya have a light green flag. To the lift ya have light green cars trying to enter the roundabout. Make a another road going left to right that DOESN'T enter the roundabout, so the light green cars don't have enter the roundabout just to make 2 left turns. On the right, ya have a gray flag. Make another road so the grey cars doesn't have to enter the roundabout. Ya are making EVERY CAR to enter the roundabout but not every car has too. Having that one car not entering the roundabout can really speed up the roundabout. A Roundabout "bypass lane."

10:39 in here you can use the fact that top send full line of red only so they should be able to enter at will, and bottom have full belt of yellow, doing same thing. IMHO optimized design can have 10x the score here.

Try adding two full lanes in he round about. One that exits to each road and one on the inside that simply circles. Many round abouts in the US use this system.

Me at 3:19 seeing matt tinkering with traffic light timings... Just provide a bypass before your traffic light for cars of the one colour... Would give you a pretty easy score boost I think?

Death to the squareabout 😂

try the system used by the dev but adding a small change, put the first second on the roads on the left of the 4 sides of the square to allow traffic to enter. then put the 2nd second for the roads on the right, since those on the first will already be circulating and will not be in the way of those that have just entered. and finally leave the third second all in red to allow time for the rondabout to clear so that the cycle can be repeated.

Try making a separate lane, so that cars don't have to go through the roundabout. So in 15:19 in the upper left, all violet cars would have the option of going directly into the violet flag.🏁

On the giga you could make a U turn immediately since that color always is next to the next exit? Like look at the gray exit, then look above the exit and it has a gray entrance. It's not a huge save but it could help with some congestion. Hopefully I explained it well enough. 20:26

I think the best thing to do is get a right turn (left in this game) always available for a car wanting to turn right which means it doesn't interact with the circle (square) at all and just goes straight to the receiving lane.

just wanted to point out one thing that should help with Giga. If you addx a bipass to the square-a-bout for those just existing one lane over, it should reduce the traffic on the actual intersection by about 5-10% which may be enough to help you finally beat the level.

If you put a left turn only from each arm of the roundabout you can get give some car colours a left lane turn without actually going onto the roundabout.

There's also enough space to separate each roundabout and have merging lanes on and off each with lights

8:24 just a thought, instead of alternating traffic signals between lanes, alternate traffic signals between cars. Lanes with same cars will go green, others is red

Was wondering with Giga if perhaps having dedicated lanes for the left most lanes would have helped, each one only has to go to the next junction so having an independent lane there could have filtered some cars and maybe freed up some space.

This looks like highways, which was first for me on this channel. GIGAlike, bro

You need some dedicated turning lanes, Matt! You should know this!

Discovers merging lanes, starts adding xmas lights in next level called meger ... classic architect move!

Cant wait to get home and test out my theory for the merger and giga and roundabout, time the traffic light that is BEHIND the traffic light to go green after the current green goes red, so cars are following traffic instead of cutting off traffic

Every off ramp should have a dedicated turning lane. You only did it for the second one on each side of the square-a-bout, but the first had a staright and turn arrow.

You can try Turbo roundabouts, where cars need to follow their lines, and they change lines on the roundabouts - so car entering from right line, at the end will leave from the left.

that last level, for should either pull the traffic lights back a bit or move the squareabout further in, there needs to be space between the lights and the squareabout, that will prevent collisions due to over eager drivers

glad to see you opening with what I was grumbling about at the end of the squarabout fiasco 😂

On Giga you should have had the center entering lane allow a u-turn before the light. This will allow 1 in 4 or 5 cars to immediately nope out into the exit lane. This should reduce traffic a bit.

The little "ayo" at the bottom killed me haha(at the we need to get people of part)

Currently in Perú, this feels exactly how they drive and how some of their lights are set up. Vietnam would be a close second for comparison, but they seem to merge a bit better without blocking over there.

Two words... Slip Roads

In the "Merge" Level, maybe it would help, when you put both left (right) lanes that dont cross the highway, in one phase, it would help.

Pro tip from europe: you can do 3 line roundabout (if you have 3 exits), so every car has free way to every exit :D :D :D PS: 99% drivers can´t drive it, and just cloged up traffic in first line, so you can´t enter, becouse they don´t exit, but continue in first line... So good luck with that driver AI in game :D

I cant help but notice that on each side there is a car that is taking the next exit. Seems to me there is room for bypassing the roundabout. Example on the bottom red cars come up on the right and exit on the left and you could just connect the 2.

On Giga, perhaps a slip road just before the lights on the arms for cars that are going around the corner? Ie. the grey cars.

I think I speak for everyone when I say... Please play more of this game!

The squareabout could use some sliproads as well ;) But all good for those cars that immidiately want the next exit. I btw do not understand why with the merger you let the top 2 roads go first :P And than have the bottom 2 roads. The top roads will drive into the incoming bottom roads. If you have bottom go first the cars are way further gone. Maybe only the left bottom road can give some carnage :P But more traffic is gone for the top roads to them turn in.

Surprised Matt didn’t try the spiral style roundabout layout, or putting the lights one square back so traffic waiting at the lights didn’t get stuck part way into a lane and block traffic on the roundabout.

I saw the thumbnail and thought we were back at freeways for a second

Big roundabouts usually have lights on the roundabout to prevent that sort of thing.

left sided traffic and a right roundabout seems like one of the most architect-like things u ever did :D

"Back of the net" had me crying 😂

What about, you add a two square turning lane on the edges, the cars over shoot their turn so if you give them a second lane like you did the roundabout so they can turn more easily I think it would work

I think for the giga, should try pattern that the outer ring should be left only, middle right should be left and forward, and inner ring to be forward only.

Yay, i hope there are more games like this

Question: Could you do a squareabout of squareabouts (i.e, a central squareabout with four squareabouts feeding into it going opposite rotations...) for this level?

Welcome back to another episode of Matts Architect tendencies! Last time we got the WrongAbout (American Squareabout). This time we get the RightAbout (British way, but lower score lol dev bias) and the Square ReichAbout (X_X). Seriously, Matt is getting silly without his supply of NiffTea!

Have cars entering the roundabout system first ride feed lanes and then navigate out of them by changing lanes into the roundabout so they don't come into it perpendicular to traffic.

The problem is that the cars that need to exit right after the turn take the leftmost lane too soon. If you could somehow convince them to be in the second leftmost lane during the turn it will fix the collision. I think allowing the second lane to go straight on the turn should work (?)

I think you can't have the same pattern for all lanes, if you see, the left/right are bigger, so they can stay a bit more time on stop mode. Just a guess.

19:13 It would've worked if you had done the same thing for all corners, I think. You seem to have forgotten a few places where cars could still go straight through

if you move the entrance traffic lights one backwards, it'll prevent a lot of collisions.

For merger, you shouldn't need the top arms that are closest to the exit for the single color to have a traffic light at all? It should basically just work.

Impressive work, man!

On the merger, whouldet doing the crossarms be better than to do both top and both bottom, so its one top and one bottom eachtime and alternate left and right, so kinda like dev but doing one right and one left instead

Oh yes I know that road very well in-between the uni and the prison plenty of wonky roads where I live in llanharan

It looks like the only issue with the traffic in both of the Giga solutions is that the traffic is trying to merge left in the intersections instead of driving through then merging. I wonder if adding arrows indicating they can only go straight through the intersection and another after it allowing left merges would solve that?

Some cars of the incoming left lane want to go to the first exit. Connect these two lanes with an extra arm

Day sixty nine (nice) of asking Matt to add the Second Narrows Bridge, Ironworkers Memorial to the Wheel of Bridgetune It is a cantilevered truss bridge, carrying 6 lanes of traffic from Vancouver to North Vancouver in B.C. across the second narrowing of the Burrard Inlet. It's name comes from the fact that it collapsed twice during construction, which unalived 23 people in total (Hence the name, ironworkers memorial).

You should put dedicated lanes that don't join the square-about, kinda like a u-turn or texas-turn-around.

Put a turn at the very first square for every entrance for the roundabout. You'll eliminate an entire color from one single lane of traffic if you can set it up correctly.

In My country square roundabouts are quite popular would say

A question for the dev regarding the three-lane giga-roundabout around 20 minutes... why do we have cars coming in on the same road they're supposed to be exiting on? That tells me that they shouldn't have been on that road in that direction in the first place. And after watching the dev's "solution" for that last level... I really think that the game should be renamed to "CARnage" or "Carnado"... just a thought.

For giga, i think if you had made the entirety of the outside lane dedicated to turning off, that would've prevented the blue from merging into intersection

I solved the last level by forcing all outer lanes to turn no matter what. A similar solution to you but forcing the turn out which caused less mess or confusion to the AI drivers

5:02 the road looks like a swastka

Try to add some shortcuts from each far-left road to the nearest exit, this should relieve the traffic on the roundabout a bit

You may notice there were cars literally going the wrong way on roads to bypass traffic lights, so you literally have to design roads with "what if half of the drivers ignore traffic laws?" In mind

I instantly got this and play tested (and there were more levels when I got it) after watching your first video Need to check and see if there's more levels still... Also, my Giga had a similar traffic light pattern to the dev except it had turn lanes exiting the mess where I could fit them (the houses got in the way at times). I may have also gone one extra lane in, but it's been a week, so idk. ¯\_(ツ)_/¯

16:19 pov french people in the most known roundabout in Paris : « place de l’Etoile » or also named « Arc de triomphe »

I'm glad Matt figured out his American behaviour from the previous episode... and that he didn't miss the "car-nage" joke... but I'm only a third of the way through the episode, so I'll finish watching before commenting further.