Road and Rail Customizations Lost
Symptom
In-game road/rail customizations (lane arrows, traffic lights, restrictions, etc.) are not loading/saving properly
Cause
This is usually due to having two or more versions of TM:PE subscribed at the same time, even if only one is active.
There are other causes, such as incorrectly moving Steam library to a different drive, mod conflicts, etc., however those will exhibit more obvious game stopping errors when launching the game or loading a game.
Solutions
Make sure you only have one version of TM:PE subscribed
Disabling mods is not sufficient, you must completely unsubscribe them
Do this from Content Manager > Mods, or from Steam Workshop
Make sure you don't have any Incompatible Mods
If you do, unsubscribe those as well
After changing mod subscriptions, always exit the game to desktop to flush old code from RAM
If problems persist, check for recent updates that might have caused the problem:
In Steam client, select Workshop tab
In the sidebar, select Subscribed Items from the Your Files menu
On the page that appears, change Date Subscribed to Date Updated in the sidebar
That will show you what's been updated recently, with the most recent items at the top:
If TM:PE is in that list, it's likely a bug in the update: Report a Bug
If it's some other mod, it might be a conflict:
Try disabling that mod (then exit to desktop to flush from RAM) and try again
If problem is resolved, contact the author of that mod to let them know
If there's nothing obvious causing the issue, it might be a game update:
Game updates are mentioned on Steam "myapps" page, News tab on Steam, Announcements on Paradox Forums, r/CitiesSkylines, etc.
TM:PE will warn you if it detects a game update:
It's likely we will already know about the bug and are working on a fix
But please let us know anyway as you might spot a bug we don't know about
Was it Fixed?
If not, please let us know: Report a Bug
Other issues? See: 👉 Troubleshooting