Last year we released a crowd simulation add-on for Blender. This year we've added traffic simulation to the add-on. We've created a short video that shows the features and possibilities of the traffic simulation. More tutorials on traffic and crowd simulations will follow soon.
The traffic simulation is released with the CrowdSim add-on but is also available as a separate add-on. Besides the paid add-on there is also a demo version available. The demo contains all features but is limited to 25 agents. There's a discount 'till the 1st of December 2019.