Last year I had a couple does standing no more than 10 yards from my parked ATV.....another one wouldn't come across the cut line because she saw it and didn't like it. On a different trail I came across a doe as she crossed the path...she trotted about 30 feet off the trail,stopped, and then came directly back to me for another look.I think they are like other vehicles...the deer really don't know what they are unless you get off it....then they recognise you...