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.
MUTCD-style sign reference illustration. Always verify against the official CA MUTCD and Caltrans sign charts.
| Sign code | OM3-L |
|---|---|
| Federal code | OM3-L |
| Name | Object Marker (Type 3) |
| Category | Object Markers |
| Shape | Rectangle (Vertical) |
| Color | Alternating yellow and black stripes |
| California status | Used in California per CA MUTCD |
| Typical CA minimum size | Per CA MUTCD object-marker standards |
The official dimensioned layout drawings below show the exact border widths, legend and letter heights, spacing, corner radius, and the standard sizes used to fabricate OM3-L. Use them to confirm sign sizing for your road type before finalizing a traffic control plan.
Standard sizes for OM3-L are not tabulated here — see the official layout drawing below for full dimensions.
Layout drawing extracted from the FHWA Standard Highway Signs (public domain). Verify exact dimensions and sizes against the current CA MUTCD, Caltrans sign specifications, and Standard Plans for your application.
Download this sign or open the official MUTCD reference.
Official source: FHWA Standard Highway Signs, 2024 (11th Edition) — Object markers.
This is an educational reference. Verify sign use, size, placement, and application against the current CA MUTCD, Caltrans sign specifications, Standard Plans, and the reviewing agency. Official source links are gathered in one place.
View official sourcesA striped Type 3 object marker used to mark the end of a roadway or a substantial obstruction, with stripes indicating the direction to 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. In the field, OM3-L Object Marker (Type 3) is typically positioned at the advance warning area, ahead of the work. Common deployments include marking the end of a closed roadway; mounted on barricades at closures; directing traffic around full obstructions. Always confirm its size, retroreflective sheeting, spacing, and placement against the CA MUTCD 2026 and the reviewing agency before finalizing the traffic control plan.
Used in California at the end of a closed roadway or on barricades to mark a full obstruction and direct traffic to the open side.
Common field deployments
Agency review note
StreetsLA, LA County DPW, and Caltrans District 7 may require larger sizes or additional devices. Verify with the reviewing agency before finalizing the TCP.
Typical minimum: Per CA MUTCD object-marker standards.
Sizes are CA MUTCD minimums and vary by roadway classification and speed. Verify against the CA MUTCD 2026 (CA MUTCD Part 3F (Object Markers)), Caltrans sign specifications, and the reviewing agency.
Where it sits: Advance warning area, ahead of the work.
CA MUTCD reference: CA MUTCD Part 3F (Object Markers).
In Los Angeles, this sign must conform to CA MUTCD 2026. Work in City of LA right-of-way is reviewed by StreetsLA and the Bureau of Engineering (BOE); state highways in LA County are permitted and reviewed by Caltrans District 7; county roads are permitted by LA County DPW. Sizes, retroreflectivity, and placement must meet CA MUTCD minimums — local agencies may require larger signs based on roadway class, speed, pedestrian volume, and proximity to schools or transit.
Confirm Type 3 markers are used at closures and roadway ends with the correct stripe direction. Public Ready reviews closure delineation.
These signs are typically deployed alongside OM3-L on a California TCP.
Marking a roadway end or closure? Public Ready can supply Type 3 object markers and barricades.
Free official resource — opens official government website
Free official resource — opens official government website
Free official resource — opens official government website
Free official resource — opens official government website
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.
This sign is commonly used in advance warning and traffic control devices. Learn more about traffic control device requirements, setup, and field readiness at WorkZoneCompliance.com.
Learn more at WorkZoneCompliance.comPublic Ready can help with OM3-L Object Marker (Type 3) — including sign rental or purchase, work-zone signs, TCP sign legends, and permit coordination, and agency-review support for Caltrans District 7, the City of Los Angeles, and LA County.
