Proper Traffic Variety version 1.4 for American Truck Simulator (v1.41.x)

- Greatly reduced the appearance of trucks with trailers.
- Greatly reduced the appearance of police.
- Greatly reduced the appearance of buses.
- Vehicles (standard) not sold in the USA no longer appear.
- Unrealistic cars no longer appear (some fire trucks, 2012 CHP Charger, etc.).
- Outdated cars no longer appear (MCI MC-12, NHP Crown Victoria, etc.).
- Each spawn rate is based on empirical data, at least somewhat accurately reflecting the car culture of each state. For example, electric cars dominate in California, while pickups are more common in other states.

Other notes:
- Compatible with all map mods, traffic packs, and DLCs; however, map traffic does not affect it.
- Since traffic packs are not optimized for this mod, this may cause traffic generation issues, relevant for Utah, where spawn rates were heavily modified (normal spawn rates range from 0.5–1.00, but had to be multiplied by 1000 for each vehicle) due to combat measures hardcoded in the game.

Resolving incompatibilities:
- Place below Brutal Traffic (supports traffic class variety while allowing Brutal Traffic density).
- Place below ATS Traffic Behavior (maintains class variety while allowing traffic density).
- Place below Meatballs Traffic Density Mod (supports class variety while allowing mod traffic density).
- Place above Realistic Traffic mod (allows creating modified vehicles by overriding its spawn edits).