If you want even more immersion, consider adjusting your traffic density settings in the game's config.cfg file to see more of these beautiful models at once.
Despite the high detail, the models are optimized to prevent the memory overflow issues that can sometimes plague heavily modded games. TRUCK TRAFFIC PACK BY JAZZYCAT V8.3 1.46
You don't need to overwrite any original game files; these trucks are added alongside the default ones. If you want even more immersion, consider adjusting