If you are looking to get started, these maps are the gold standard for city driving in Assetto Corsa:
You cannot simply download a map and expect traffic to appear. To get the full experience, you need a specific software stack: Assetto Corsa City Map With Traffic Mod
The "NoHesi" Culture: Inspired by the real-life "Mid Night Club," players compete to see who can cut through traffic with the most precision and speed. If you are looking to get started, these