Configuration for a 5120x1440:
https://pastecode.io/s/8nwhza6n
Works great for a Samsung G9 49" single screen

12280x2160 (3840x2160 x3) setup: Be sure to load your savegame, then load it AGAIN after it's fully loaded without exiting to main menu. This will fix the problem of the budget/tax windows not showing up and a few other minor glitches.

<MainToolStripScreen>0</MainToolStripScreen>
<currentScreen>0</currentScreen>
<InfoViewsContainerHeight>250</InfoViewsContainerHeight>
<InfoViewsContainerScreen>0</InfoViewsContainerScreen>
<StatisticsButtonHeight>1</StatisticsButtonHeight>
<StatisticsButtonScreen>1</StatisticsButtonScreen>
<InfoPanelHeight>2116</InfoPanelHeight>
<MainToolStripHeight>1</MainToolStripHeight>
<ThumbnailBarHeight>2045</ThumbnailBarHeight>
<TSBarHeight>2068</TSBarHeight>
<FullScreenContainerHeight>2065</FullScreenContainerHeight>
<MultiScreenWidth>12288</MultiScreenWidth>
<MultiScreenHeight>2160</MultiScreenHeight>
<SingleScreenWidth>3840</SingleScreenWidth>
<SingleScreenHeight>2160</SingleScreenHeight>
<CameraFov>30</CameraFov>
<isFullScreen>true</isFullScreen>

Great mod, 5760 x 1080 triple monitor awesomeness, but my city bar isn't there! Everything else is visible, the container is there but there are no building options in it - roads, buildings, parks, etc. Can anyone help?

@electronicLight
at least not for me...

Can somebody help me with the configuration for a 3x(3840x2160) Setup? I don't know what settings don't look like somebody took my HUD and threw it out of the world. =(

Does it work on linux?

For the issue with the Budget/Economy window, I've found that after your city finished loading, if you load it again the window is now centered correctly. Work for me at least.

This provides a fix for single monitor peeps to-I have a 4k screen(50") and can have the game on the top half, as i do with most games
Im stuck with the taxes\economy screen on the far right cut in half off screen. Anyone know what setting to fix this?
1x 4k Screen - 3840x1920
<MainToolStripScreen>-300</MainToolStripScreen>
<currentScreen>0</currentScreen>
<InfoViewsContainerHeight>250</InfoViewsContainerHeight>
<InfoViewsContainerScreen>0</InfoViewsContainerScreen>
<StatisticsButtonHeight>0</StatisticsButtonHeight>
<StatisticsButtonScreen>0</StatisticsButtonScreen>
<InfoPanelHeight>1036</InfoPanelHeight>
<MainToolStripHeight>0</MainToolStripHeight>
<ThumbnailBarHeight>965</ThumbnailBarHeight>
<TSBarHeight>988</TSBarHeight>
<FullScreenContainerHeight>985</FullScreenContainerHeight>
<MultiScreenWidth>3840</MultiScreenWidth>
<MultiScreenHeight>1080</MultiScreenHeight>
<SingleScreenWidth>1920</SingleScreenWidth>
<SingleScreenHeight>1080</SingleScreenHeight>

no. I've been trying to troubleshoot a bit. I've found a couple other mods that seem to conflict with the positioning, such as advanced toolbar. Perhaps it has something to do with adding icons to the UI?

Works how its described, nice thank you sir!

To be honest, i'm not sure. I haven't played cities in almost a year. I have no clue what mods are out there. Are you by any chance running "Flawless Widescreen" in the background?

correction, most things work with the 5760x1080 resolution, but the UI bar still spans the 2nd and third screens, doesn't seem to matter weather i use windowed, fullscreen, with or with my borderless game window app. I used the settings in the working config and it worked great as vanilla, but now that I have added all my mods I have this spanning issue. Could it be possible that its being messed up by another mod?

Cannot seem to get the budget window to line up a 7680x1440 resolution. it seems to be cut off at either the bottom or top, depending on where i set the height, and is positioned between the 2nd and third monitor. Any suggestions? (I can use the one for 3x 1080 monitors....but I'd rather make use of what I have instead)

Just wanted to confirm that as of Sep 2016, this is still working perfectly. Thanks dude, it was really bothering me that I could not get this game to the resolution I wanted.

3360x1080 bliss.

Indeed, 8core AMD FX-9370, I didnt realize how much this game was processor heavy. Good to know for when I add a third monitor it seems it will run like a champ, I got zero loss of FPS with two monitors.

ahh, and I see the 1 min thing was another mod not this one lol, nvm that >.>

Cities Skylines heavily depends on the CPU. You must have a good CPU. Theres no special code. The source code is public.

https://bitbucket.org/wbakunis/mmcs/src/6793892229d8bf6babe6f5705dbff8f046790328/Source/?at=master

what surprised me is that I've gotten no noticable extra lag on my system at all, double the resolution with no drag, how? What is this voodoo you doin here? :D

Heres a screenshot, it feels wierd flying around with a black line in the middle though, I need a 3rd monitor stat!
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=648617576

@Nucloid hahaa, well I did notice when the inspiration came and I searched for this mod, it said you'd only just uploaded it like 1 min prior. Thanks for being right on time :D I do have both the DLC and no conflicts so far.

@macronomicus I'm glad it's working for you. I haven't updated this to work with the DLC. I thought I had this mod set to private anyways ROFL.

Holy crap its working well with Eyefinity :) flying around at 3840 x 1080 two monitors is awesome, I dont notice any extra load on the system either, now if I just shred off the bevel on the monitors it will be perfect lol.

This mod needs some work, it's clearly made for someone using only two monitors but needs a lot of adjustment for three monitors. You should give the option to just center the HUD with a certain size to make setting this up with three monitors a lot simpler.

HOhOHohOh thisd is crazy!

Wait, do I have to have Eyefinity set up or can I just use my two extended monitors? I dont want to set up eyefinity for this, as with Eyefinity with 2 panels you get every stupid menu right in middle of two panels...

but I actualy found a trick, just put the game windowed mode, and after that just press alt enter
and will put the game fullscreen if all your monitors are set as one resolution in physX panel in Nvidia control panel right click on desktop and set it up :) works just as good!

thank you! can you please just leave it on the workshop and not delete it? because it works fine!

ill upload more images in a bit.