Im doing a road traffic simulation and have noticed that the vehicles are far too passive. I know for a fact that in the area this simulation is supposed to be the people at the wheel are far more "aggressive" and give less headway and dont yield as much.
I have scoured every piece of official and non official documentation but cannot find an answer.
You can't.
The library is a black box that only "opens" the settings that you can see in the blocks. The only additional settings you can play with (beyond the block properties) is the "Road Network descriptor":
But there is no aggressiveness setting. If this is the key purpose of your model, you either create your own ABM logic from scratch or you'd need to check other tools that are focused on cars (but typically, these are then far more restrictive on other dimensions that AnyLogic is flexible on, it all depends on your model purpose)