Cars now automatically clear impeding trees and rocks.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
Last time I tried this the performance hit was horrific, especially near big patches of trees (when you want it to be there). Has that been improved?
I have tested it and I never got any performance hit whatsoever. It could be some other mod or just a weak computer. But there is nothing really to change for better performance.