Not sure it would work with large trucks. I have found mowing against traffic (in reality so I have some opportunity to see what’s coming so I can move if necessary and possible) with a grapple and flashing lights gets people’s attention and they move over. As best I can tell it looks like something you really don’t want to hit.Well in my case we are talking a Farm to Market Road with petroleum tanker trucks running 60 mph up and down it. And about 1/3rd of mile of frontage to mow. I like your idea....just wouldn't work for me.