OM Series — Object Markers
Warning Signs · CA MUTCD Part 6, Chapter 6F
The OM Series covers object markers — retroreflective warning devices used to delineate physical obstructions in or adjacent to the traveled way. OM1-3 (Type 1 object marker), OM2-2V (Type 2 vertical object marker), and OM3-L (Type 3 object marker) are used in California TCPs to mark bridge ends, island noses, channelizing device faces, guardrail ends, and other fixed hazards that drivers could strike. Object markers provide critical nighttime delineation in work zones.
California Field Use Notes
Object markers are required by the CA MUTCD wherever a fixed object or obstruction could be struck by an errant vehicle. In California work zones, OM3-L (the striped Type 3 marker) is commonly attached to the face of concrete barriers and Type III barricades. OM1-3 and OM2-2V are used at the ends of channelizing islands and medians. Retroreflectivity must meet CA MUTCD minimums — replaceable sheeting panels are commonly used to maintain compliance.
Showing 13 of 13 signs
Marks an obstruction or hazard within or adjacent to the roadway, using a high-contrast pattern to make the object visible day and night.
A striped object marker that delineates the edge of an obstruction, with the stripes sloping down toward the side traffic should pass.
A striped Type 3 object marker used to mark the end of a roadway or a substantial obstruction, with stripes indicating the direction to pass.
The OM1-1 Object Marker Type 1 sign is a California MUTCD object marker sign. It is shown here as an educational reference with the official FHWA Standard Highway Signs layout and California sizing guidance.
The OM1-2 Object Marker Type 1 sign is a California MUTCD object marker sign. It is shown here as an educational reference with the official FHWA Standard Highway Signs layout and California sizing guidance.
The OM2-1V Object Marker Type 2 sign is a California MUTCD object marker sign. It is shown here as an educational reference with the official FHWA Standard Highway Signs layout and California sizing guidance.
The OM2-1H Object Marker Type 2 sign is a California MUTCD object marker sign. It is shown here as an educational reference with the official FHWA Standard Highway Signs layout and California sizing guidance.
The OM2-2H Object Marker Type 2 sign is a California MUTCD object marker sign. It is shown here as an educational reference with the official FHWA Standard Highway Signs layout and California sizing guidance.
The OM3-R Object Marker Type 3 sign is a California MUTCD object marker sign. It is shown here as an educational reference with the official FHWA Standard Highway Signs layout and California sizing guidance.
The OM3-C Object Marker Type 3 sign is a California MUTCD object marker sign. It is shown here as an educational reference with the official FHWA Standard Highway Signs layout and California sizing guidance.
The OM4-1 Object Marker Type 4 sign is a California MUTCD object marker sign. It is shown here as an educational reference with the official FHWA Standard Highway Signs layout and California sizing guidance.
The OM4-2 Object Marker Type 4 sign is a California MUTCD object marker sign. It is shown here as an educational reference with the official FHWA Standard Highway Signs layout and California sizing guidance.
The OM4-3 Object Marker Type 4 sign is a California MUTCD object marker sign. It is shown here as an educational reference with the official FHWA Standard Highway Signs layout and California sizing guidance.
Educational reference only. This is not an official Caltrans, FHWA, or local agency publication and is not legal or engineering advice. Always verify sign selection, size, placement, spacing, and application against the current CA MUTCD 2026, Caltrans sign specifications, Standard Plans, project documents, and the reviewing agency’s requirements.
Need OM Series signs for a California project?
Public Ready can help you source, rent, or purchase OM Series signs and integrate them into a compliant traffic control plan. For work zone compliance support, visit WorkZoneCompliance.com.