Has anyone seen how the mow the banks along the interstates here in Texas? Perhaps they do it the same way elsewhere. While I've seen the specially designed hill mowers on here before, the state guys here appear to be using stock John Deere 6000-series 4WD tractors with bushhogs on the back. I've seen them do it, and I still don't understand how they keep the tractors on 4 wheels. Do the wide mowers behind them help provide stability? Some of the hills look to be at least 20-30 degrees.