Version 1.1:
Support 3 new states: North Dakota, South Dakota and Missouri
Updated Data Source – The mod now uses Q2/2024 data, leading to adjusted spawn rates:
SUV spawn rate increased by 35% in all states except Colorado.
Passenger car spawn rate increased by 35% in all states except California and Washington.
Pickup truck spawn rate increased by 20% in all states except Idaho, Montana, and Wyoming.
Ford’s vehicles spawn rate decreased by 10% overall, exclude Ford F-Series.
Toyota’s vehicles spawn rate increased by 10% overall.
Vehicle Classification Overhaul: All vehicles are now categorized into standard models and luxury/executive models. Luxury and executive vehicles will appear more frequently in wealthier states, while more affordable models will be prevalent elsewhere.
Model Year Influence: Older car models (pre-2010s) will now be rarer compared to modern vehicles.
Added Discontinued Models: Vehicles that have been officially discontinued will now have a lower spawn rate.
Added Van Vehicles with three common body types: Light Commercial Vehicles (LCV), Minivans and RVs.
The overall spawn rate for vans remains low to reflect their market share.
LCVs will also have a fixed spawn rate across all states to reflect their widespread commercial use.

If you have been playing ATS for a while, you would notice the game spawns AI vehicles at a balanced rate that makes the majority of AIs spawn nearly everywhere.
However, in real life, certain car brands are more dominant in specific states than others, like Ford in Wyoming and Arkansas or Honda/Audi in California.
To put it simply, this mod’s main purpose is to adjust the AI spawn rate and spawn area to relatively reflect US Car Culture better.
What I did was simply reclassify all the models to their accurate class (Compact to Full-size, Muscle, Pony, etc) plus their type (SUVs, Sedan, Pickup trucks), and then collate them with shared statistics of vehicles of their respective brands from the Internet and ChatGPT to get the desired number I wanted.
Therefore, with this mod, you should be seeing more sedan-type in plain/urban states, while pickup trucks and SUVs would be more noticeable in rural/mountainous states.
Below are some pictures captured in-game to give you a quick glimpse of traffic in some states. (g_traffic is set to 2 and is used for reference only

Los Angeles, CA – State with the highest share of sedan-type vehicles, which would make you catch various of them in traffic
Phoenix, AZ – Similar to CA, Arizona also slightly favors sedan-type vehicles more.
Casper, WY- Rugged Terrain and harsh weather are what make it one of few states that have a high share of pickup trucks
Colorado Springs, CO – Being a mountainous state also makes Colorado has more use of SUVs and Pickup trucks.

IMPORTANT:
For compatibility, this mod should be compatible with any traffic density/realistic traffic mod, as this mod just modifies specific spawn rates from the country folder. Additionally, I also recommend pairing this mod with a traffic mod (recommend Cip’s RTD) and use default g_traffic, this would make the AI spawn change more naturally while still noticeable.
I am not from the US, and the data I used might be outdated. Therefore, constructive criticisms, feedback, and suggestions are all welcomed. As this mod leans towards realism, I want to make this as accurate as possible.
Besides SCS base AI in-game, I have also made add-ons for Jazzycat’s AI Traffic and Classic Car Pack , which supported his mod’s latest version. Download links for them are below.
Lastly, the mod currently only support base map + all map DLC. AI will still spawn in states that come from map mods, but all will use the default spawn rate instead. If this mod working well then I will add support for popular map mods such as EMMN and C2C in near future.

LOAD ORDER: BELOW any traffic mod and ABOVE AI Traffic Pack. If you are using any Realistic AI Traffic Coloring, such as the one from CairamR, put this mod ABOVE those as well

Credits:
justheretolurk

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