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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



User Feedback



Recommended Comments

Thank you so much for everything you've done so far. People like you who likes to help makes the world a better place. I do have a situation.

When I first started playing this game, I was annoyed with the phenomenon of cars fading in and out. So I googled for a solution and downloaded Persistent Automata Mod 2.0 from http://community.simtropolis.com/files/file/23362-persistent-automata-mod/ . Later on, I encountered other problems so I googled for another solution and that's how I knew about NAM. I installed NAM 34. But now I have the problem of cars fading in and out again. I renamed the three files downloaded from http://community.simtropolis.com/files/file/23362-persistent-automata-mod/ by placing a capital Z at the beginning of their names and placed them in C:\Users\Moussa\Documents\SimCity 4\Plugins\Network Addon Mod. The problem is solved. But I am afraid that I might had created another technical problem that I am not aware about. Is what I did okey?

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Is more better make one way highway in draggable version. Then, combine 2 of one way highway into 1 regular highway.

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After installing NAM 35 it seems that I'm still using NAM 34 and nothing has changed. I can't find the NWM transition that appears in the thumbnail, for exemple. Hope you guys can help me. :lol:

 

 

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On 11/10/2016 at 10:40 AM, Nathan_spcity said:

After installing NAM 35 it seems that I'm still using NAM 34 and nothing has changed. I can't find the NWM transition that appears in the thumbnail, for exemple. Hope you guys can help me. :lol:

 

 

IDK if there are puzzle piece transitions but I do know that all of them are draggable.

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On 12/11/2016 at 0:36 AM, dc'smycity said:

IDK if there are puzzle piece transitions but I do know that all of them are draggable.

There are some puzzle piece transitions in NAM 34 already, but IDK about NAM 35

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On 11/15/2016 at 6:03 PM, Nathan_spcity said:

There are some puzzle piece transitions in NAM 34 already, but IDK about NAM 35

Yeah, I haven't yet had the time to look at all the great featurs of NAM 35.

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I installed this version hoping it would just add to what was already there. No it just forces a new learning curve to use "flex ramps" which I have no idea how to use. I have been using puzzle piece RHW connectors to street e.g. height transition RHW puzzle piece ramps to street with great efficiency and have mastered the puzzle piecing and can do it very quickly and easily. Now it's been robbed off my menu and all I saw were the confusing flex ramps which no matter how I donked around with it I could never get it to do what I wanted and couldn't find useful documentation on how to make draggable connecting RHW ramps to street because they either simply didn't work in my install or I am clueless on how to use them.

 This seriously irritated me so I went online to see if I could find NAM 32. Nope it was deleted for version 35. Well luckily I found NAM 32 on my secondary hard drive and just manually deleted NAM 35 out of my primary plugins and reverted back to NAM 32 to avoid hassling with the new version. I'm not up for a new learning curve and then stealing things that worked fine from the menu seems pointless to me.

I think I will just stick with NAM 32 because I generally just use railway, occasionally tram rails and some Fractional Angle Roads (FAR), RHW and Symphony RHW and for what I have used it seems to be very stable and I just think it's weird to force users into a learning curve either that or I am experiencing a massive glitch. I'm getting too old for massive learning curves when it was already working. I have the belief if it ain't broke don't fix it.

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So I want to use this but it has a bug and you need patch 640 but it is not here and even google can't find the 640 patch so essentially this is useless.

Thanks but no thanks.

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38 minutes ago, SherylinRM said:

So I want to use this but it has a bug and you need patch 640 but it is not here and even google can't find the 640 patch

Hi there,

The NAM only requires the game patched to 1.1.638.0 (EP1) to proceed with the installation. This can be downloaded from this page, or at the Maxis Files section at SC4Devotion.

If you'd like to install it, the nightlights update can be found here, and must be applied after the EP1 update.

Hope this helps. :)

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@cyclone

I already have that patch installed.

Ok then so why do others say in others forums that patching to 640 stops a possible crash in NAM when you hover a piece over a roadway ?

And no i don't remember off hand where I seen it sorry.

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4 minutes ago, SherylinRM said:

Ok then so why do others say in others forums that patching to 640 stops a possible crash in NAM when you hover a piece over a roadway ?

That would refer to @simmaster07's SC4Fix, which is a specially crafted DLL file resolving this issue:

 

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@cyclone

 

aha well thank you very much. I use to use nam years ago on my XP system but now that I have 8GB's of ram I wanted to try the updated version and now I can.  Thanks for this:)

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@Cyclone

I have been at this site off anf on for over a decade now.

I find looking helps lol.

I ask very few questions [check my files].

You guys do excellent work. I just wish you were in Vancouver. I would meet you for coffee :)

 

Thanks again for the help.  :)

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On 12/4/2016 at 0:20 AM, tfinvold said:

I installed this version hoping it would just add to what was already there. No it just forces a new learning curve to use "flex ramps" which I have no idea how to use.

The old puzzle pieces are actually still there, albeit the puzzle-based height transitions have been under a separate option (unchecked by default) since NAM 33 (Additional Features and Customizations > Real Highway Options (click the "+" to expand) > Legacy Deprecated Height Transitions).  There will always be some way to access them for those who absolutely have to have them, but we are focusing on draggable and FLEX items from here on out, and there are no plans to add any new features in conventional puzzle piece form.  The reason we started making the old puzzle pieces harder to reach is because ready access to both the old and new systems created substantial user confusion in the NAM 31/32 era.

The main reason we no longer see conventional puzzle pieces as viable for future development is because we began to get a lot of combination complaint/requests awhile back.  People thought there were too many puzzle pieces to navigate, but at the same time, they had a pretty substantial wishlist of things they wanted to see added to the NAM.  Unless we found an alternate solution, that meant even more puzzle pieces, which was the exact opposite of what was desired. 

FLEX pieces--which are plopped like puzzle pieces, but can be overridden by multiple networks (similar to the FLEXFly system, first added to NAM 28/RHW 4.0 in 2010)--ended up being the solution that allowed us to add features while reducing puzzle proliferation.  Each FLEX item has a "base" configuration, but plugging another override network into one of the ends of a FLEX item can transform it to match that override network (see my early demo on the height transitions here). 

The result of that with the height transitions is that we've been able to use just 4 FLEX pieces to cover the same functionality that would require somewhere around 60 conventional puzzle pieces.  In the near future, it's also going to allow us to finally offer full plop interchanges for the RHW.

-Tarkus

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i can't install.says: you have original version of the game installed in order to run the NAM, you must have the rush hour expansion pack or else... please help me.


Note: Moved to comments section. -CB


  Edited by Cyclone Boom  

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12 hours ago, sushiking90 said:

i can't install.says: you have original version of the game installed in order to run the NAM, you must have the rush hour expansion pack or else... please help me.

It's as the message says. You need to have either the Deluxe version of SC4 or the Rush Hour addon (the same thing packaged differently).

Assuming you do, then you need to install at least the EP1 patch. Without this you will encounter many problems, hence the installer will not proceed. If you have the disk version of the game, download and install the EP1 patch. If you have a digital version, it should come pre-patched. Sadly Origin are distributing an unpatched version that can not be patched either. If you have that version, you won't be able to install the NAM. Blame Origin for this embarrassing oversight which they just keep returning to.

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If Origin doesn't work - let's write this in big letters on Simtrololis site. ..

We have problems with stupid MAXIS SC4 every day. 50% of questions come from illegal peoples, 50% comes from normal people. This stupid game requires incredible!!! But I like this forever ! *:D*:D*:D 

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On 7/2/2017 at 5:55 PM, 155guy said:

how do you get the rails to look brown?

That's the RealRailway (RRW) option.

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