In vanilla Assetto Corsa, the track is empty save for your car and a few AI racers. A Traffic Pack floods the track with standard road cars—SUVs, sedans, hatchbacks, and vans. These vehicles follow predictable AI lines at realistic highway speeds (usually 60-100 km/h). They do not race you; they commute.
To achieve the designation of "High Quality," the pack utilizes a multi-tier physics approach: Traffic Pack Collision Version Assetto Corsa High Quality
Once installed, here is how to maximize the experience. In vanilla Assetto Corsa, the track is empty