Drive and yard markers com in all sizes and shapes. Your best bet is the tall fiberglass poles with reflector tape. These should be no more then a foot from the edge of the area you wish to protect. You will notice that the little flag (blue) will be covered by the first snow. A wood post with flag works well also, but as snow piles up it may break. Next is a pole from your hardware store. The last pole is what we sell.