For issues after updating to the 1.1.1b patch, see 1.1.1b Patch Troubleshooting Guide.

Current and active bugs and their fixes can be found here.

General long-term FAQs are listed below.

• Config options / Settings
  
• Lane changer / intersection editing
  
• Vehicle and speed restrictions
  
• New Roads (Bus lanes, pedestrianised, etc)

Earlier versions of Traffic++ had some problems with the loading system and weren't working properly, causing crashes when loading – it used to break loads. The save file was never corrupted.

These bugs have since been fixed in several "bug genocides", and Traffic++ now loads properly in all known scenarios.

Caution: If used, the custom roads will be included in your save games... which means you'll need Traffic++ to load them without errors. If you want to disable Traffic++, but still open those save games, enable Ghost Mode.

Also, there used to be a "phantom bridge" hiding under the map - that's been fixed too. All the early problems that people encountered with this mod have been fixed.


Remember to switch on (activate) the mod in Content Manager > Mods!

If you've subscribed the mod and it's not showing in Content Manager > Mods, do steps 1–4 here.

You might need to close Content Manager and re-open it for the Options button to appear. There are several mods that stop the options button from appearing. Another alternative is to install Improved Options Panel mod (fixed for 1.1.0).

Runways & Taxiways mod breaks Traffic++

If you're using the Runways and Taxiways mod, it breaks the Road Customiser in Traffic++ (button won't show). See the list of compatible mods for latest information and workaround.

General problems (including road customizer button missing)

In mod options, disable Ghost Mode, and then enable the features you want to use (for example, Road Customizer - which includes the lane changer and vehicle/speed restrictions). Remember to click Save button!

If problems persist, or the mod isn't listed in the Content Manager, please follow these steps to make sure Steam has properly updated your subscribed mods to the latest versions.

The "Options" button is missing from Content Manager

Are you using the Traffic Manager mod as well? Try disabling it and then reload the game. Remember to re-activate Traffic Manager afterwards. (This issue only affects a small number of users, we'll hopefully get it fixed soon).

Lane Changer (Traffic Manager) is missing

When the two mods are used together, the Lane Changer in Traffic Manager automatically disables, and the Lane Changer in Traffic++ is used instead.

Priority lanes (stop/yeild), crossings, traffic lights...

These features are from the Traffic Manager mod, which needs to be subscribed separately. If you have problems with these features please report them in the Traffic Manager forum.

I can't find the multi-track station option

There isn't one, it's enabled by default. Also, you don't need the separate multi-track station enabler mod as Traffic++ replicates the exact same functionality (thanks to Sims firehouse!).

BTW, here's a sample multi-track station asset you can use: Holstebro. If you want to create your own multi-track stations (not a trivial task), follow this guide.

Where is the prevent despawn button?

There isn't one, it's now a global setting in mod options. (Thanks to CBeTHaX!)

Note: Based on feedback, we're hoping to make this togglable in-game in a future release.


Steam failed to update your mods. Follow this guide to fix it.


After making changes, it takes a while for the existing vehicles on the map to update their routes. We're hoping to improve this in future releases to make them respect your changes more immediately.

If you want instant results, use the Despawn Vehicles feature in Traffic Manager to clear away all existing traffic; all new traffic that spawns will be aware of your vehicle restrictions and lane changes.


Have you used the Prevent Despawn or Realistic Speeds options? If so, they result in much more traffic being on the map, which can cause FPS drop / lag. Try turning those options off and see if that helps.

If problems persist, please let us know as we want to make this mod as fast as possible!


Timed traffic lights are a feature of Traffic Manager, and can suffer this bug if you store your saves on Steam Cloud. For more information, see this post.


Both Traffic++ and the Terraform Tool mods use the game's API to display their toolbar buttons, and as such they should not conflict with each other.

However, other mods which add toolbar buttons can cause problems, one such mod being Mod Corral (and mods that rely on it, such as Chirpy Banner). Mod Corral is known to have serious compatibility issues with C:S 1.1.0 patch and it's recommended to unsubscribe it (and mods that rely on it) until these bugs are fixed.


My services are not working! The houses are burning to the ground!

Service vehicles need to reach their destination quickly:

• Realistic speeds option – If enabled, it will slow down traffic so you'll need to optimise the location of your service buildings and improve your road network. Tip: Prevent service vehicles roaming to far with Enhanced Hearse AI, Enhanced Garbage Truck AI.
  
• Pedestrianised roads – make sure you have service buildings close to slow pedestrianised zones. Tip: There are "Local" service buildings in the workshop, such as a local fire station or small family clinic.
  
• Got enough services? – You'll need to keep increasing capacity as your city grows.

Why aren't my emergency vehicles using pedestrianised roads as shortcuts to avoid traffic?

Your cims decided to buy cheap sat navs that don't know about traffic jams. So they'll just sit there in a jam rather than finding a shortcut. Also, the pedestrian roads are speed restricted, so cims - even emergency services - will generally avoid them. I believe this is a good thing, since this is not supposed to be a cheat to not having to care about traffic.


Each time a new update is released a pinned topic will be created in the Discussions tab were you can post feedback, bug reports, etc. These topics have titles similar to "May 22nd Update - Feedback/Bug Reports". Old topics will be locked so always use the most recent one.

Before posting bug reports, try this.

For feature requests and general improvements, see this.