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Network Addon Mod (NAM) - Cross-Platform  49 (rev1)

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NAM Team

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About This File

The Network Addon Mod (NAM) all transportation network-related fixes, additions and new creations that have been released so far. It adds countless new features to the existing network tools, such as traffic simulator improvements, new overpasses, highway onramps, intersections, pedestrian malls, a ground light rail network, roundabouts and turning lanes.

This is the standard release version of the 49th edition of the Network Addon Mod, NAM 49.

See below for installation details and a list of new features in the Changelog at the very bottom.

 

Maxis_Logo.png
In memory of Paul Pedriana, Lead Programmer for SimCity 4, who passed away in July 2021 from a sudden heart attack while cycling. Thank you, Paul, for everything--we wouldn't be here without you.

 

RELEASE NOTES
Before you run off in excitement to install the new NAM version, please make sure to read this document first, to ensure the best Network Addon Mod experience.

Note to users of the EA App/Origin: As of June 2023, digital copies of SimCity 4 Deluxe purchased via EA.com, the EA App, or the Origin Store, or played through EA Play/Xbox Game Pass are now properly patched to Version 1.1.641, which means they are compatible with the Network Addon Mod.
 


New Features for NAM 49

See the Changelog below


INSTALLATION AND GENERAL NOTES

Before attempting to run the NAM installer, ensure that you have extracted the contents of the .zip download into a folder. Attempting to run the installer while it is still in the .zip will cause the installation to fail.

For a complete walkthrough on installation, see the enclosed read-first-NAM-49.html file, or https://www.sc4nam.com/docs/getting-started/

 

The minimum requirements for running the Network Addon Mod are as follows:

  • A compatible retail copy of SimCity 4 Deluxe Edition OR SimCity 4 with the Rush Hour Expansion Pack:
     
    • Windows/Linux (via WINE): Any digital retail edition, or any disc copy updated to at least Version 1.1.638.
       
    • macOS: Any recent digital edition of the Aspyr port for macOS (installation on the App Store version is more difficult, and the NAM Team is limited in our capacity to provide installation help to App Store users).
       
    • The now-rare non-Deluxe/non-Rush Hour copies of SimCity 4 are not supported. Attempting to run the NAM on a non-Deluxe/non-Rush Hour copy of SimCity 4 will cause the game to immediately crash to desktop (CTD).

       
  • Java Runtime Environment (JRE), in order to run the installer--a version for 64-bit Windows is included in the download (OpenJDK11U-jre_x64_windows_hotspot_11.0.8_10.msi).
     
    • If you are not on 64-bit Windows and need Java, Adoptium's open-source edition is recommended, though JRE and JDK can also be acquired in proprietary/commercial (but free to download) form from Oracle at Java.com.
       
    • The Java Development Kit, or JDK, will also work, but contains extra files not needed unless you are a Java developer.

       
  • A system with the following specs, for each basic type of NAM installation:
     
    • NAM with a LowRAM/NoRHW Controller option: Any system built within the last 15 years, with 750MB available disk space. (Users running this option cannot install the RealHighway (RHW) features.)
       
    • NAM with a Full 4GB Controller option: Any system with a 64-bit operating system, at least 4GB RAM, and 1.2GB available disk space. If on Windows, the 4GB Patch must be applied to the game's executable.
       
    • NOTE: Installing the Full 4GB Controller option without meeting the specifications and without the 4GB Patch will cause the game to crash-to-desktop (CTD) upon attempting to load a city. If you experience this crash, it either means your system does not support the Full 4GB Controller option, or there was some form of failure in the 4GB Patch process.
       
    • Additional Requirement on Windows/Linux (if running Full 4GB Controller/RealHighway options) (not required on Mac): 4GB Patch by NTCore (included in download, automatically installed on Windows with standard installation procedure, and also available at NTCore).
      • See Step 3 (under "On Windows") or the 4GB Patch section in the read-first document for more details.
         
  • Additional Requirement on Mac (optional for Windows/Linux): JDatPacker by memo.
    • JDatPacker is a tool for consolidating folders of SimCity 4 plugins. This can speed up the game's performance, and on macOS, this helps alleviate issues with the Aspyr port's known "number of files limit", wherein exceeding a certain number of files/folders within the game's Plugins directory can cause the game to crash.

 

To install the Network Addon Mod:

  1. Install the Java Runtime Environment (JRE) (if already installed, skip to Step 2).
    (This is included in the download package.)
     
  2. Remove any existing NAM installations, if present (simply deleting the "a_Network Addon Mod Lite" and/or "Network Addon Mod" folder from the Documents\SimCity 4\Plugins directory is the easiest way).
     
  3. Run the NAM Installer:
    • On Windows:
      • If it your first time installing the NAM (or you are installing on a new system/with a new SC4 install), use NetworkAddonMod_Setup_Version49.bat. If you are upgrading from a previous version, or have manually installed the 4GB Patch already (see the 4GB Patch section in read-first), use NetworkAddonMod_Setup_Version49.jar. (The .bat file has a routine to automate the 4GB Patch installation process, necessary to avoid CTDs if running the Full 4GB Controller option, which is necessary to use the RealHighway (RHW) features.)
         
    • On macOS:
      • Run NetworkAddonMod_Setup_Version49.jar.
      • If on the App Store version, the installer cannot directly install into the Plugins location the App Store version utilizes, which is inside the .app file (~/Library/Containers/com.aspyr.simcity4.appstore/Data/Documents/SimCity 4). Install to an alternate location first, then copy the resultant "Plugins" folder into that location. Note that the NAM Team is currently very limited in our ability to provide installation assistance to App Store users.
         
    • On Linux:
      • Run NetworkAddonMod_Setup_Version49.jar, or, if that fails, run NetworkAddonMod_Setup_Version49.sh.

         
  4. Follow the installer's instructions, clicking on each tab on the top bar in order:
     
    • Agree to the mod's terms on the initial "welcome" tab to proceed with the installation.
    • Select the options you would like to install under the "files" tab.
       
    • Select the install location under the "location" tab. Unless you have set up an alternate location for your Plugins folder, or happen to be on the Mac App Store version of the game, this should work fine.
       
    • Finally, move to the "install" tab. Click the "Start installation" button to begin the installation process. When the installation is complete, the progress screen will display a message, "All selected components installed!".
       
    • Close the installer, using the "X" button or, on macOS, the red circular button, in the upper right corner of the window. You're all done installing the mod.

       
  5. Additional step for Mac users (optional on Windows/Linux):
    (Run JDatPacker to consolidate the mod's files.)
     
    • If on the App Store version, run JDatPacker over the resultant Plugins directory, then move the "Network Addon Mod_###.dat" files (wherein "###" is a three-digit number) into the container.
       
    • On the Steam version (or if optionally using JDatPacker on Windows), run JDatPacker on the Documents\SimCity 4\Plugins directory (this will also consolidate your other plugins as well). Make sure you remove the original directories that were consolidated, and, if upgrading or reinstalling your NAM package at any point, ensure you delete any the "Network Addon Mod_###.dat" files from your Plugins before running the new installation. It is recommended that you use a new subfolder (i.e. "Plugins\Compressed Files") instead of installing to the root of the Plugins directory, as this can help prevent mod conflicts.

       
  6. Load the game and enjoy the NAM!
     
    • If the game crashes on your first attempt to load a city, this means you have the Full 4GB Controller installed, but either have experienced a failure in the 4GB Patch process, or have an incompatible system (not enough RAM and/or a 32-bit operating system). Either attempt to install the 4GB Patch manually, or choose a less intensive installation option (the Low RAM/No RHW option, or download NAM Lite instead).
       
    • Note that if you've never run the NAM before, and you've picked a fuller installation option, the initial load of the game, and of the first city tile you open may be longer--often quite noticeably. This will shorten with subsequent loads of other cities, or, if you exit and re-enter the game, subsequent re-entries will be quicker.
       
    • If you do not see any icons in game, this most likely means your installation ended up in the wrong location. Either reinstall, making sure the files go into your Documents\SimCity 4\Plugins folder (true of Windows and the Steam Mac version), or, if you're on the Mac App Store version, make sure you copy the files into the .app container.


More details on installation and compatibility can be found in the enclosed read-first-NAM-49.html file.

 

NAM Lite

As mentioned above, an alternative compact version of the NAM is now available, which can be installed instead of the full NAM installation package.

The NAM Lite features just the most essential of NAM features, including the NAM's renowned Traffic Simulator Plugins, refining SimCity 4's pathfinding engine to work as it was originally intended, along with Automata Controller options, updated textures (including a Euro/International texture option), Roundabouts, Diagonal Streets, additional interchanges for the game's base Highway system (the "Maxis Highways"), and (optional) Hole Diggers/Ground Raisers, allowing for precise terrain alteration.

See here for more details and to download NAM Lite:

 

DOCUMENTATION

For further details on the NAM and its features, visit our new website at:
https://www.sc4nam.com/


Please note that NAM 48 and earlier have been discontinued, and are no longer eligible for any form of technical support.

Thank you all for your continued support--hope you enjoy!

©2025 NAM Team

What's New 49 (rev1)   View Changelog


Released

New Features for NAM 49

Release Notes for NAM 49 (rev1) (4 March 2025):

  • Bridge Additions and Improvements:
    • Red Truss Arch, Yellow Steel Girder, Green Truss, and Blue Suspension Bridges by IDS2 have been added for Road, Street, One-Way Road, AVE-2, ARD-3, NRD-4, OWR-3, RHW-2, RHW-3, RHW-4, and SAM Sets 2 and 6-11 (68 bridges total).
    • Viaduct Bridges by Kitsune added at L3-L4 for MIS, RHW-4, and RHW-6S, and L0-L2 for Dual RHW-4 and RHW-6S (12 bridges total).
    • Plain Bridges by eggman121 have been added for Hybrid Railway (HRW) at L0-L2 (3 bridges total).
    • Ponte di Piacenza RRW Bridge by Ulisse Wolf added.
    • Yes, that's 84 bridges.
    • Every bridge has had its ceiling height updated (L0/Ground Level=-0.000001, L1=-7.5, L2=-15, L3=-22.5, L4=-30) to allow for a lower ferry clearance and for the elevated bridges to behave as . . . elevated bridges. As result the ferry clearance is now 270.1m / +20.1m. At this time its unknown how to get the in the game message to reflect this value, therefore it will incorrectly state the bridge is not suitable for ferries even though it is.
    • For models where property bridge obstruction = false, they have had the property removed after it was discovered the game is incorrectly treating it as bridge obstruction.
    • Night textures fixed for RRW/Rail bridges, including the Iron Girder, Steel Arch, and Green Garabit Viaduct.
    • A pathing issue with the RHW-10S Cable-Stayed Bridge has been fixed.
    • Bridge Controller file has been renamed from "NetworkAddonMod_Bridges_Plugin_Controller.dat" to "NetworkAddonMod_Bridge_Controller.dat".
  • Mass Transit Authority (MTA) Station Update:
    • Improvements across the board to Station Transit-Enabling (TE) properties.
    • Added SW77 El-Rail-over-Road station.
    • Added several new stations, including the SW77 El-Rail-over-Road station, the Mattb325 Victorian Diagonal L1 Viaduct E-RRW and separate HRW versions, the DBSSYMN Winterton HRW L2 Terminal, the DBSSYMN Winterton L2 Viaduct Rail Terminal, the DBSSYMN Dresden HauptBahnHof, the Oidaas and Tyb06 HRW L1 Station, and the Art128 and Tyb06 Noah Diagonal Tram Stop.
    • Changes to the TE modding on the L2 Diagonal Rail stations, so they are now fully functional with E-RRW, you can just drag through the network on the lot. (They are also still functional with the puzzle pieces).
    • DN/MN prop options added.
    • LHD path remapping has been updated for GLR LOTting paths.
  • Street Network and SAM Improvements:
    • Street and SAM network paths have undergone a comprehensive set of improvements.
    • A texture issue has been fixed with the SAM-7 x Avenue OxO intersections.
    • SAM texture file architecture has been redesigned to ease future additions and maintenance.
    • Shadow remapping and LHD pathing has been improved on Elevated Rail and Monorail crossings over SAM.
    • SAM x RRW crosslinks have been improved.
  • RealHighway Improvements:
    • 3-Level Crossings adjacent to 45° FLEXFly setups are fixed.
    • 45° FLEXFly-over-45° FLEXFly now supported in limited circumstances.
    • The diagonal overhanging models for the RHW-3, RHW-4, and MIS have been redesigned to minimize terrain clipping issues (wherein the terrain would poke through the highway).
    • Major improvements have been made to the Type 21 exemplars on elevated RHW networks, especially those involving placement of support pillars.
    • Diagonal interactions between the RHW-2 and single-tile Maxis networks have been improved, particularly transitions and OxD T-intersections with Street, Road, and One-Way Road.
    • Stability improvements have been made to the L1 and L2 RHW-3 Type A1 ramps.
    • Numerous tooltip texts have been updated to properly indicate current network support.
  • Roundabout Improvements:
    • Thanks to Lucario Boricua, the NAM's roundabouts have received a comprehensive set of pathing fixes, designed to improve capacity and Pedestrian functionality.
  • Other Various Improvements:
    • The NWM's NRD-4 network now has a Diagonal Starter.
    • Various previously-unsupported T-intersections involving Avenues and One-Way Roads have been added.
    • Missing texture for Double Orthogonal Street x Diagonal Avenue intersection has been added.
    • NWM DxD intersections now have improved models with smoother corners and terrain handling. There is also now a non-default option to alter the Road and One-Way Road DxD intersections to use similar overhanging models (the "Wide Corner Road and One-Way Road DxD Intersections" option, found under "2 Additional Network Features > Road, One-Way Road, and Avenue").
    • Raiser/Digger icons have been revised.
    • A new icon has been added at the bottom of the Highways Menu (right near the NAM Controller Marker) to show which capacity level of the NAM Traffic Simulator one has installed.
    • Issues with the Draggable Fractional Angle Road streetlight placement has been addressed.
    • Replaced `EU_Common_Sign_Props.dat` with a version from rivit, which rescales the props to be a bit smaller.
    • Semi-Auto Turn Lane textures have been updated to fix wealth-related issues reported by Dead_End.
    • Duplicate Rural FTL textures in the US folder have been removed.
    • Fractional Angle Road at-grade crossings with orthogonal RealRailway now have paths.
    • The Maxis Highway Override (MHO) Diagonal Bridge Enabler (DBE) support files have been added.
    • rev1 update: Fixes version mismatch issue in the revised One-Way Road Roundabout paths that could cause CTDs with diagonal Road or One-Way Road connections into the roundabout.
  • Like 236
  • Yes 22
  • Thanks 50

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Toby66

....

Edit: All explained in the ReadMe file that came with the zipfile for all installation instructions.

Edited out my previous questions.

 


  Edited by Toby66  

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Tarkus

@peek-a-boo, to answer your question, the NAM is packaged inside an installer (mainly as it's too complex to reasonably install manually in its current form) so you wouldn't drop the file inside this package into Plugins. Instead, run the NetworkAddonMod 36 Setup.exe file outside the Plugins folder, which will allow you to install the mod with the options you want.  The files will eventually end up in Plugins\Network Addon Mod and Plugins\z___NAM after you run the installer.

This is true of the Steam version, and pretty much every other version of the game out there.

  • Like 1

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Tarkus

@he1997, the NAM does not include the Diagonal Bridge Enabler as part of its core set of files, and it's quite likely that the files might have gotten pulled out by the NAM installer as part of the pre-install file cleanup, to avoid potential conflicts.

Try reinstalling the Diagonal Bridge Enabler after installing the current NAM.

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Tadeu Ciampi

This Mod is complex but great, I am still getting used to it. 

Now I am having one small issue, about the streets. These many streets styles, you can have them in the city in different styles as long as they are connected to a road. Because if you connect two different street styles then one style will overcome the other street to mach only one style.

Why is that? Would anyone know how to solve that?

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matias93
9 hours ago, Tadeu Ciampi said:

This Mod is complex but great, I am still getting used to it. 

Now I am having one small issue, about the streets. These many streets styles, you can have them in the city in different styles as long as they are connected to a road. Because if you connect two different street styles then one style will overcome the other street to mach only one style.

Why is that? Would anyone know how to solve that?

because the method to apply the different street styles (SAM) depends on overriding the style each time. There is a way to keep those separate, and is using some transit-enabled lot to divide both sides. I would recommend to install the RTMT 3.6 and use the SAM street bus stops to delimitate the styled streets.

  • Like 1

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Tarkus
On 3/13/2020 at 7:22 PM, mysticvirtue said:

after downloading what do I do?

Open the .zip and run the installer.  The mod has too many moving parts to feasibly allow a manual install, and as such, simply dropping it into your Plugins folder does not work.

  • Like 1

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BarefootWalker

Works with the GOG.com installer.

You can install it at C:\Program Files (x86)\GOG Galaxy\Games\SimCity 4 Deluxe Edition\Plugins.

 

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ldcta

I have no words to describe how thankful I am to NAM Team and this mod.

I've been playing SC4 since I was 8 and back then I remember how frustrating some of the limitations of the game were to me, mostly traffic related. I'm from São Paulo and there's a ton of creative (yet not always very effective) solutions to its transportation system that I as a kid wanted so bad to build in my cities, like underpasses, overpasses, roundabouts, sunken highways and so on.

So I was introduced to mods and NAM when I was idk 13 and it was a complete, absolute game changer to me. It was like a dream coming true. Actually it wasn't like a dream coming true, it indeed was a dream coming true. Everything I always wanted to do were now right before my eyes. I couldn't believe it.

Here I am, 11 years later, still happily playing SC4 and still having the time of my life using the awesome tools this mod provides.

This is the story of a transit-fanatic little boy whose dream came true thanks to NAM Team.

I should have done this a long time ago but here it is: thank you. Thank so much NAM Team. Thank you.

  • Like 1
  • Yes 1

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20huskies

Disappointed Origin won’t let it work. Is there a version out there that will? Something is better than nothing.

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Cyphr

Thank you so much for this mod, NAM Team. I'm revisiting SimCity 4 after almost a decade. I have the Steam version of SimCity 4 Deluxe (Clean copy..no mods previously installed). Downloaded and installed NAM 37 without receiving any errors.

I have a question about the 4GB patch. I did not receive a prompt to install the 4 gb patch during the NAM installation process. I'm running this on a Windows 7 PC (x64) with 8 GB RAM. Do I have to install the patch separately? If yes, which .exe file should I patch. The patch installer opens a window to pick an .exe file. And I don't know what to do next.

Would really appreciate any help from the NAM Team and all members.

Thanks again for this amazing mod!

Edit: So I figured out, I had to patch the SimCity 4.exe buried deep inside steam folder (..\Program Files (x86)\Steam\steamapps\common\SimCity 4 Deluxe\Apps)

Seems to work fine now. Only thing is, after NAM installation, starting on a new block from the Region screen takes a while to load. Without NAM, it would load almost instantly. Is this normal?

TIA


  Edited by Cyphr  

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teknojempol

Is this plugin can run on 2gb ram ? I tried and CTD happened.

edit :i have patched SimCity 4.exe with 4gb _atch (although using 2gb ram) and problem solved

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dmn

Is there an install guide for those of us who are not real good at the interworkings of this stuff?

Thanks in advance.

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Evanjs

Unfortunately I can’t download this new update. I’ve tried to download the way someone comment on this and still will not work is they any updated YouTube videos? So I can download it. 

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Evanjs
On 7/5/2020 at 8:34 PM, Cyphr said:

Thank you so much for this mod, NAM Team. I'm revisiting SimCity 4 after almost a decade. I have the Steam version of SimCity 4 Deluxe (Clean copy..no mods previously installed). Downloaded and installed NAM 37 without receiving any errors.

I have a question about the 4GB patch. I did not receive a prompt to install the 4 gb patch during the NAM installation process. I'm running this on a Windows 7 PC (x64) with 8 GB RAM. Do I have to install the patch separately? If yes, which .exe file should I patch. The patch installer opens a window to pick an .exe file. And I don't know what to do next.

Would really appreciate any help from the NAM Team and all members.

Thanks again for this amazing mod!

Edit: So I figured out, I had to patch the SimCity 4.exe buried deep inside steam folder (..\Program Files (x86)\Steam\steamapps\common\SimCity 4 Deluxe\Apps)

Seems to work fine now. Only thing is, after NAM installation, starting on a new block from the Region screen takes a while to load. Without NAM, it would load almost instantly. Is this normal?

TIA

I can't do that i just did what you did and it will not work or even extract into the apps folder

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UrbanField

I'm still trying to figure out how to elevate the Flex SPUI to L2. You say it has to be done by connecting the "TuLEP OnSlope" piece. Either I'm not finding it or not applying it correctly. I watched Tarkus' video on his YT channel where he explained how to do it (back when SPUI was new), but it doesn't help me. 

I hope someone can help me out.. 

 

EDIT: It worked with the Deprecated RHW4 On-Ramp, just like it used to be when it came out. But only for the Flex SPUI, not for the Diverging Diamond Interchange Piece. Maybe the despriction regarding this is not correct? Or I didn't fully understand it yet :???: 


  Edited by UrbanField  

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AOM1550
On 9/7/2020 at 10:33 PM, Tarkus said:

@aom1550 You need to install the included 4GB Patch file (4gb_patch.exe).  See my post here.

thanks :(*:D

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Tarkus
On 7/13/2020 at 9:10 AM, UrbanField said:

EDIT: It worked with the Deprecated RHW4 On-Ramp, just like it used to be when it came out. But only for the Flex SPUI, not for the Diverging Diamond Interchange Piece. Maybe the despriction regarding this is not correct? Or I didn't fully understand it yet :???: 

The Diverging Diamond Interchange (DDI) piece isn't a FLEX piece--it's currently just a standard, static puzzle piece.  It can't accept overrides of any kind as a result (part of the reason we've been doing away with standard puzzle pieces), so hooking any onramps/starters (deprecated or otherwise) up to it will have no effect.  There are plans to eventually make a FlexDDI, but those are quite some time off still.

  • Like 1

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Babarigo

Hello, I've just updated my game from NAM 36 to NAM 37 and I've struggling with railway slopes which are much stricter than before. What is the option that I hav to uncheck during the installation to have railway slopes like in vanilla ? I've upload a screenshot to show what kind of slope I can't build railway on it anymore. Thanks.
EDIT: I found it, it was the Tunnel and Slope Parameters in the Rail folder. I

image.png.0db4ce3a0b83a3dbe0952081a2d3cee2.png


  Edited by Babarigo  

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