HAR §19-129-16. first advance warning sign and the work site

(3) Where the speed limit is thirty miles per hour or thirty-five miles per hour, except as provided in paragraphs (4) and (5) of this subsection, an advance warning sign shall be placed, on each approach affected by the work, approximately seven hundred fifty feet in advance of the work site. Additional advance warning signs shall be placed at two hundred fifty-foot intervals between the first advance warning sign and the work site. Exceptions may be permitted by the authority upon application of the person performing the work where placement of the advance warning sign may not be feasible or may cause confusion. (4) Where the speed limit is thirty miles per hour or thirty-five miles per hour and the work being performed is engineering survey which is confined between traffic lanes so as not to impede the passage of traffic in the adjacent lanes, a single high level warning device, such as a set of red flags or a flasher, may be used in lieu of the advance warning signs. These devices shall be placed, on each approach affected by the work, approximately three hundred fifty feet in advance of the work site. Additional high level warning devices may be placed between the first high level warning device and the work site. The flags on a device shall be at least eighteen inches in length by eighteen inches in width, and shall be red or another color approved by the director. The flasher on a device shall be amber in color. The flags or flasher shall be at least five feet above the pavement level. (5) Where the speed limit is thirty miles per hour or thirty-five miles per hour and the work being performed is engineering survey, service, maintenance, or inspection work which is being performed during off-peak hours, does not interfere with traffic movement, and lasts no longer than three hours, a single high level warning device described in paragraph (4) of this subsection may be used in lieu of the advance warning signs. The device shall be placed, on each approach affected by the work, approximately five hundred feet in advance 129-6