WIP AI Personalities Mod: Dynamic Driver Behaviors for BeamNG Traffic

brunifdez · Aug 23, 2025 at 12:45 PM

SupraTech said: ↑

This is a work-in-progress mod that brings personality-based AI drivers into BeamNG.drive.
The aim is to increase realism, unpredictability, and immersion by giving each vehicle a unique
"driver" with a unique behavior profile.

What Does It Do?

This mod gives each vehicle driven by AI in your simulation an arbitrary or user-defined personality.
Each personality affects how the vehicle acts, such as:

- Driving behavior
- Speed limits
- Aggression and carefulness level
- Reaction to collision
- Specific idiosyncrasies based on the personality

It supports free drive, scripted AI modes, as well as the official traffic system, all due to a method
that enforces the selected personality so that the game is unable to override it.

Features (Current)

- Gives a random personality to all current AI cars
- Has an in-game UI app to see and manually alter personalities
- Behavior is applied at all times
- Allows personality-based reactions like running away or reckless driving
- "Randomize All" button for complete AI madness
- Easily expandable to add custom personalities

Personalities Included

Normal
Drives in a speed-restricted manner, with ease and experience. Rarely is involved in accidents.

Elderly / Beginner
Drives slowly, has difficulty parking or maneuvering. Likely to cause minor accidents through lack of experience.

Karen
Drives slightly over the speed limit, consistently cuts others off, drives with an attitude of entitlement, and peels out if guilty in an accident.

Aggressive 1
Drives recklessly over speed limits. New driver, likely to create serious crashes. Likely to cut across lanes or drive on the wrong side of the road.

Aggressive 2
Rapidly and highly reckless, but highly skilled. Rarely has crashes but often creates near misses. Drives through congested traffic confidently.

How It Works

- The mod is programmed in Lua and is executed on every frame in order to apply the vehicle's personality values.
- A minimalist HTML/JS frontend to control personality settings in-game.
- The system is comprised of modules, which means adding and modifying personalities are done in ease.

Features in development

- Automatic personality assignment for newly spawned traffic vehicles
- Persistent memory or personality evolution
- Statistics tracking (e.g., accidents by accident type)
(MIGHT NOT GET INTO THE FINAL MOD)

Feedback Welcome

I appreciate suggestions, bug reports, and behavioral changes. If you have ideas for additional personas, edge cases, or UI improvements, feel free to post.

Q&A

Q: What does this mod do?
A: This mod adds driver personalities to BeamNG AI cars, making the traffic act more realistic and varied.

Q: Does this mod work with the official Traffic Tool?
A: It works with Traffic Mode by reasserting the personalities continuously to prevent BeamNG from overriding them.

Q: Can I manually apply personalities to specific vehicles?
Q: Is there an in-game UI to see and manually adjust the personality of each vehicle?
A: Yes, there is an in-game UI to view and manually adjust the personality of each vehicle.

Q: Will this mod impact performance?
A: The mod runs small Lua code every frame, which has little effect on performance in most systems.

Q: In what way do the personalities influence driving behavior?
A: Each personality alters parameters such as aggression, caution, speed limits, and special behaviors like fleeing after accidents.

Q: Can I add my own custom personalities?
A: Yes, the system is modular and you can modify or add personalities by editing the Lua config files.

Q: Does the mod handle newly spawned vehicles automatically?
A: Yes, the mod detects new AI vehicles in traffic and assigns them personalities on the fly.

Q: What if I want to disable personality reinforcement temporarily?
A: There is no switch for that currently, but by request, it can be added in future updates.

Q: Will this mod work with multiplayer or mods that modify AI?
A: It's single-player. Compatibility with multiplayer or conflict with other AI mods has not been tested.

Q: Where do I post bugs or feature requests?
A: You can post feedback directly on the forum thread where the mod is being hosted or PM me.

Q: Will the mod be compatible with BeamNG updates?
A: It should be compatible with the latest versions, but major game updates may require mod updates.

Q: Does the mod affect player-driven vehicles?
A: No, personalities are only applied to AI-driven vehicles.

Q: Are crashes or accidents handled by personality?
Q: Do some personalities get into more accidents, and others drive more safely?
A: Yes, some personalities get into more accidents, and others drive more safely.

Q: Can I disable certain personalities?
A: Not currently, but this would be an option in a future release.

Q: Can I reset all personalities to default?
A: Yes, there is a "Randomize All" button in the UI that gives all vehicles personalities.

Q: How do I uninstall and install the mod?
A: Installation directions are provided in the forum post. Uninstall by removing the mod files from the mods directory.

Q: Will the AI personalities help me win a race against my friends?
A: No, this mod does not improve AI driving skills for racing it just makes them drive like real drivers.

Q: Can I get the AI personalities to drive like a grandma on a walker?
A: Yes, there is an "Elderly/Beginner" personality that drives slowly and carefully, though they might make a few bumps in the process.

Q: Can the AI personalities intentionally crash into my player vehicle?
A: They don't have "evil intentions," but some aggressive personalities do drive erratically and will bump into you.

Q: Can the AI personalities get better at driving over time?
A: Not yet learning and personality memory are on the agenda but not implemented.

Q: What if my AI car is performing crazy stunts or flying?
A: That's probably a bug or conflict with another mod; report it so it can be fixed.

Q: Can I assign a personality to my player car?
A: No, this mod only controls AI cars, not the player.

Q: Can I get the AI personalities to sing karaoke while driving?
A: That's outside the scope of this mod but it would be awesome!

Q: Will this mod slow down BeamNG?
A: It's been written to be lightweight, so you should see little to no loss in performance.

Q: What if I press all of the buttons in the UI at once?
A: Be my guest! Just don't say I didn't warn you if things get wild.

Q: Can I sue you if the AI crashes in real life?
A: No. It's just a game mod.

Q: Will the AI personalities obey my cat's commands?
A: Only if your cat is a licensed driving instructor.

Q: Can I code the AI to do donuts on the middle of the highway?
A: You can attempt to, but there will be a few very angry virtual drivers behind you.

Q: Are the AI personalities scared of ghosts or UFOs in the game?
A: Only if you enable "Supernatural AI mode" which doesn't exist. Yet.

Q: Will the AI personalities phone me to tell me that they're stuck in traffic?
A: If they start calling, I'll worry. As it stands, you're safe.

WIP Beta will be released sometime next month. I'll notify you so you can try it out.

Important Notes About the UI and Traffic Mode

- The in-game UI app to view and alter personalities is heavily work-in-progress (WIP) and not yet have full functionality.
- Full and stable support for the official Traffic Mode is still under development.
- Currently, personality enforcement in Traffic Mode is sometimes partial or inconsistent.
- Please treat this mod as an early beta; patience are appreciated while these features improve.

Have a nice day
Click to expand...

This looks very promising! I hope the devs see this and maybe implement something similar in the future

SupraTech · Aug 23, 2025 at 1:42 PM

brunifdez said: ↑

This looks very promising! I hope the devs see this and maybe implement something similar in the future
Click to expand...

Ye. Fir the moment.ill do it
--- Post updated ---

Alex1126969 said: ↑

Hello there! I just want to tell you that I am also a very big fan for this mod and your idea, this feature should have been in the game a long time ago, haha, and if I may, I would like to propose some features for future updates like adding dynamic personality shifts (like stress or mood changes), environmental reactions (rain, night), and custom events (road rage, illegal turns) or I was even thinking about new personas like Distracted Teen or Delivery Driver, and include bios or voice/text reactions for flavor if that is even possible. For the UI, consider overlays, incident heatmaps, and sliders to control personality distribution, that would be very cool! With that said, I wish you good luck and am eagerly waiting for the release! :-D
Click to expand...

For the release it will be like I already shared, but will put some of the ideas of yall

Alex1126969 · Aug 23, 2025 at 3:36 PM

Sounds good, thank you for replying! I can't wait for the grand release )

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