Technically any road that isn't a driveway can be considered a highway. Thats how "highway patrol" cops can get away with passing through multiple local jurisdictions since they cover all roads.
Looks real to me. I've lived in areas where I knew people that would ride lawnmowers around town... did it myself a couple times, but I was going to a couple yards to mow grass when I was in HS trying to make a buck. ....and I wasn't drunk