Welcome to the forum! Nice to have you with us!
Unfortunately, I can't be of any help to you on this subject. I've never heard of a type of grass that could prevent wet ground from turning to mud when vehicles are driven on it. Maybe there is such a thing, but I
sure don't know of it. Hopefully, another member has better information about the various types of grasses.
"Isn't it enough to see that a garden is beautiful without having to believe that there are fairies at the bottom of it too?" - Douglas Adams