I often never use the small vegetation in my parks and often wondered why not. I liked to decorate the park with these small plants so I kept some areas I think they looked nice.
Once I am needed to reach an enclosure, I drove my MVU team to the intended destination but was stopped, like something was in front of me, which I saw nothing from the first person view. I tried again and the MVU keeps hitting something, I got out of the car to see what is stopping me from passing, and it turns out the small vegetation is preventing my MVU team passing through the tight area.
I understand if it was a tree or something remarkably massive and rooted, but I do believe we could run over (through) these small vegetation. They really do not need to stop the ranger and MVU team's progression.