Missing game log, thats a new one!
Post a game log IF you want to tell you what is YOUR problem. Yeah, YOUR problem.
Roex team has absolutly NOTHING to solve.

let me ask our magician to use his crystal ball, maybe he can see something and we will get back to you with a solution

with your configuration you can play the game very well, vegetation issue is not a crash problem: broken game files (you can check them on Steam), bad/outdated mods, bad hardware
the game DOESNT crash using higher or lower detail, you can have a bad FPS but not crashes.

your issue is ETS issue sience release, they have a DRIVING SIMULATOR using almost no traffic and a stupid AI behaviour. On your problem....traffic_rules_spawn can have 1 milion spawning rate IF in traffic_data the AI count is NOT enabled. By default: traffic_data : .traffic.data { # max_vehicle_cou...

read this https://roextended.ro/forum/viewtopic.php?f=19&t=2607

What traffic_lane has to do with my post? That's the file to establish density on the type of road (urban, highway, low). Traffic area take this values and apply it to the respective area.
Dont touch other files (lane or rules) because those are very sensitive.

use ROEX 4.1 FREE and road connections for 4.1, what you have is outdated.

dont play with traffic rules, its an world of pain, as SCS edit that every update deleting or adding parameters. traffic mods are dealing with it using just traffic_rules_spawn.sui for example (from Supertraffic) traffic_rule_data : traffic_rule.s_car_u { # name: "Spawn density car urban" rule: "den...

learn to make a map combo
https://roextended.ro/forum/viewtopic.php?f=15&t=2307

extended one
https://www.gmc-logistics.co.uk/afroeuroasia-1-49-new

There is no growth of the fanbase. The amount of people dropping the game is huge. We have tons of newcomers also(see any support channel available) and this is NOT a way to grow your bussines. We did some research to see if we need to develop a map for ATS also and the interest was nearly zero. Tha...