As I was going through the last of the pictures of my camping trip I found these and wondered how many people use this method of preventing cattle from leaving. Is it used in your area? We call it a cattle guard or a Texas gate. Apparently cattle will not cross because they cannot stand on it as their hooves slip right through. There were a number of them throughout the journey, some without the ridges to drive on and unless you slow to a crawl the vibration will shake your teeth loose.