Type 2 or Type 3 object markers may be used at locations such as those described in the preceding Support paragraph. In other cases there might not be a physical object involved, but other roadside conditions exist, such as narrow shoulders, drop-offs, gores, small islands, and abrupt changes in the roadway alignment, that might make it undesirable for a road user to leave the roadway, and therefore would create a need for a marker. These include underpass piers, bridge abutments, handrails, and culvert headwalls. Objects not actually in the roadway are sometimes so close to the edge of the road that they need a marker. Section 3C.03 Markings for Objects Adjacent to the Roadway If traffic can pass to either side of the obstruction, the alternating black and retroreflective yellow stripes (OM-3C) shall form chevrons that point upwards.Īppropriate signs (see Sections 2B.33 and 2C.20) directing traffic to one or both sides of the obstruction may be used instead of the object marker. The alternating black and retroreflective yellow stripes (OM-3L, OM-3R) shall be sloped down at an angle of 45 degrees toward the side on which traffic is to pass the obstruction. To provide additional emphasis, large surfaces such as bridge piers may be painted with diagonal stripes, 300 mm (12 in) or greater in width, similar in design to the Type 3 object marker. In addition to markers on the face of the obstruction, warning of approach to the obstruction shall be given by appropriate pavement markings (see Section 3B.10). Obstructions within the roadway shall be marked with a Type 1 or Type 3 object marker. Section 3C.02 Markings for Objects in the Roadway When object markers or markings are applied to an object that by its nature requires a lower or higher mounting, the vertical mounting height may vary according to need. When used to mark objects more than 2.4 m (8 ft) from the shoulder or curb, the mounting height to the bottom of the object marker should be at least 1.2 m (4 ft) above the ground. When used for marking objects in the roadway or objects that are 2.4 m (8 ft) or less from the shoulder or curb, the mounting height to the bottom of the object marker should be at least 1.2 m (4 ft) above the surface of the nearest traffic lane. OM4-3 is shown as an all-red diamond shape.OM4-2 is shown as a black diamond shape with nine red circles denoting red retroreflectors, mounted symmetrically in three diagonal rows on the marker.OM4-1 is shown as a red diamond shape with nine red circles denoting red retroreflectors mounted symmetrically in three diagonal rows on the marker.OM4-1, OM4-2, and OM4-3 are shown labeled as end-of-roadway markers: The stripes are at a 45-degree angle, beginning at the upper right and slanting down to the left. OM-3R is shown as a vertical rectangle with diagonal alternating black and yellow stripes.OM-3C is shown as a vertical rectangle with diagonal alternating black and yellow stripes that form upward-pointing chevrons.The stripes are at a 45-degree angle beginning at the upper left and slanting down to the right. OM-3L is shown as a vertical rectangle with diagonal alternating black and yellow stripes.OM-3L, OM-3C, and OM-3R are shown labeled as Type 3 object markers: OM2-2H is shown as a horizontal all-yellow rectangle. OM2-1H is shown as a horizontal white rectangle with three yellow circles denoting yellow retroreflectors in a horizontal row on the marker.OM2-2V is shown as a vertical all-yellow rectangle.OM2-1V is shown as a vertical white rectangle with three yellow circles denoting yellow retroreflectors in a vertical column on the marker.OM2-1V, OM2-2V, OM2-1H, and OM2-2H are shown labeled as Type 2 object markers: OM1-3 is shown as an all-yellow diamond shape.OM1-2 is shown as a black diamond shape with nine yellow circles denoting yellow retroreflectors mounted symmetrically in three diagonal rows on the marker.OM1-1 is shown as a yellow diamond shape with nine yellow circles denoting yellow retroreflectors mounted symmetrically in three diagonal rows on the marker.OM1-1, OM1-2, and OM1-3 are shown labeled as Type 1 object markers: This figure illustrates 13 object and end-of-roadway markers. Object Markers and End-of-Roadway Markers
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