The FALLEN ROCK ZONE (NYW4-14) and SLIDES (NYW4-15) signs may be used, as necessary, to warn of roadway sections where rocks fallen from a side slope or slides of soil, rock, or other material may obstruct the roadway or shoulder, or otherwise affect normal traffic flow.
Guidance
The FALLEN ROCK ZONE and SLIDES signs should be removed when the condition stabilizes, or is corrected, and future incidents involving fallen rocks or slides are considered unlikely.
The FALLEN ROCK ZONE and SLIDES signs should be supplemented with Distance plaques where the roadway section is 1000 feet or longer. Additional FALLEN ROCK ZONE and SLIDES signs, supplemented with
Distance plaques stating the distance to the end of the section, should be placed at suitable locations (for example, beyond intersections), and at appropriate intervals, in long sections. Where such additional sign is placed within 1000 feet of the end of the section, the Distance plaque should be omitted.
