First of all, why a traffic density mod is necessary?

SCS has built an impressive AI traffic system, but the default settings are too basic , often leading to sparse and unrealistic traffic patterns. This mod brings balance by adjusting spawn rates dynamically, ensuring realistic car vs truck ratios , better urban vs highway distribution, and more natural behavior throughout the day. 

Forget using g_traffic=10 just to see more vehicles — this mod makes g_traffic=1 feel alive and realistic , without distorting vehicle ratios or overloading unnecessary areas like crossroads or local streets. 

About Real Traffic Density:
- it was designed to create a realistic traffic density taking advantages from the latest traffic system implemented by SCS starting in game version 1.30
- with this mod, ETS2 receives a personalized density and ratio set at default g_traffic 1. it takes into account all game features from 1.30: spawn and ratio by daytime, type of roads, city size, density and ratio being set according to the game time scale
- thanks to SCS I was now able to set for example more cars and buses in cities and more trucks on freeways, or more cars at rush hours
- the semaphore profile includes increased green duration at large city roads, also more green time at road works semaphores and globally 3 seconds on yellow instead of 2 (from green to red)
- since traffic is much more dense, more car colors were needed to avoid having the same few SCS colors. to modify the existent colors check this topic viewtopic.php?f=177&t=246123 (if you use my sounds packs all Ai cars have own real colors)

Compatibility and how to use:

• ⚠️ Never increase g_traffic!  Always keep it at g_traffic=1 
• 📁 Place this mod above any map mods  or other traffic-related mods
• ❌ Not compatible with Standalone Hungary Map 

🧩 Optional addon available for ProMods users , syncing with its road types and road_look settings

Known issues not related to my mod:
1. Game can crash if a lot or traffic packs are used in combination with traffic density mods in general. as soon as you add more packs, you will notices a quick increase of RAM usage until game reach a certain limit and will inevitably crash with the following error
Failed to assign pool segment (models) for incoming allocation of size
the solution for this was kindly offered by SCS with launch option codes which increases the pool size and the number of buffers in launch options
I successfully use these values with GTX 1060, I7 4770 3.4 Ghz and 16 Gb RAM Code: Select all
-mm_pool_size 4000 -mm_max_resource_size 50 -mm_max_tmp_buffers_size 1000for lower PC configuration you need to decrease these values (don't increase them if you have a more powerful PC) please read more here
2. other traffic minor issues
-in some crossroads traffic rules might not be respected (prefabs issues)
-Ai merging on motorways might hang long time (prefabs issues)
-Ai cannot spawn in some places so you may find places where traffic is present only in one direction (scs issue, they work on it)
-Accidents on the roads that you never see happening (scs issue with multiple Ai spawning in identic locations)
-Ai can still fail in overtaking another Ai or the player (scs weak codes for timing and acceleration of Ai when overtaking)
- Slow downs or even stops on the roads, especially around gas stations

How can you improve traffic in your game:
-for better traffic diversity you may consider using additional traffic packs
-you can use motorcycles, classic and sport cars from existent packs as separate types of vehicles! this has been implemented in my sound packs, if you use them you don't need to change anything. without traffic sounds you could rename in each pack you use the def/vehicle/sii file name as following:
traffic_storage_sport.any_name.sii
traffic_storage_classic.any_name.sii
traffic_storage_moto.any_name.sii
important: what's in green must be exactly as it is, any other modification will make the list unavailable. the yellow part is optional, necessary if you add vehicles from several packs, if you do this be sure you don't
have a name conflict
note that adding these as separate vehicles, it will slightly increase traffic density and the overall balance of cars vs trucks.