Maybe it IS illegal, I don’t know, but I have noticed that many residents that mow their properties are mowing it such that the grass clippings are being blown onto the road pavement, where it turns into a dangerous slippery mess that could wipe out any unsuspected hapless motorcycle rider that is unfortunate enough to be having to drive on that road! I can’t believe that so many people are doing that! Every day when I drive down the road I see grass clippings on the road, and it bothers me a lot; especially now that my hubby owns a motorcycle!