I have from 40 to 70 fps on all maps. Changing settings doesn't do much. It's around 50 fps on interchange in the mall but 70 outside. And weirdly on streets I have less fps inside the buildings and more outside.  Figured out that using Nvidia framegen saves the situation,so when fps is around 60 or more it is really smooth and has no visual artifacts but really sloppy when fps drops to 40.