CarMaker is a simulator of the road traffic, developed for real-time simulations and evaluation of various car models. It includes interactive maps with traffic signs and conditions, driver behavior modeling and vehicle dynamics (with a model for any standard or exotic vehicle). For each simulated scenario, a car is driven on a predefined route through realistic cities, with dozens of roads and intersections. You can use multiple cars simultaneously, as well as, together with other people. By the way, you can download CarMaker on Steam here https://store.steampowered.com/app/793660/.