Traffic Signs
Regulatory Signs
Warning Signs
Posts & Hardware
TRAFFIC SIGNS
  • Regulatory
  • Warning
  • School Zone
  • Construction
  • Guide Signs
  • Posts & Hardware
PARKING SIGNS
  • All Parking Signs
  • No Parking
  • Handicapped
  • Reserved
  • Custom Signs
SUPPORT
  • Contact Us
  • FAQ
  • Shipping
  • Returns
  • Track Order
COMPANY
  • About Us
  • Use Cases
  • Get a Quote
  • Sitemap
  • Privacy
  • Terms

© 2026 TrafficSigns.com — A division of Traffic Sign Corporation

1-877-936-9998service@trafficsigns.com
  1. Home
  2. Equipment And Supplies
  3. Posts And Hardware
  4. Type 3 Object Markers - OM3-C

Type 3 Object Markers - OM3-C

Type 3 Object Markers - OM3-C
Min: 1 • Max: 1000
Unit Price:$0.00
Quantity:× 1
Total:$0.00

Secure checkout • 100% satisfaction guaranteed

Choose Your Reflectivity Grade

Compare visibility, durability, and ideal applications

Type I

Engineering Grade

Ideal Use

Parking lots

Brightness

Standard

General Lifespan

7 years

Night-time Visibility

500 feet away

Type IV

High Intensity Prismatic

Ideal Use

Roadways

Brightness

High

General Lifespan

10 years

Night-time Visibility

1000 feet away

Type IX

Diamond Grade

Ideal Use

High-speed roadways

Brightness

Maximum

General Lifespan

10+ years

Night-time Visibility

1500 feet away

Product Details

Type 3 Object Markers - OM3-C

Type 3 Object Markers (OM3-C) are essential safety devices designed to warn motorists of obstructions within the roadway. Constructed from high-quality .080 aluminum with standard 3/8" mounting holes and radius corners, these markers meet both DOT and MUTCD state and federal guidelines. Engineered for maximum visibility, the markers feature high-intensity and diamond-grade reflective surfaces that ensure clear identification during day and night conditions. When installed, the edge of the marker closest to the road user should align with the nearest edge of the obstruction. For guardrail and roadside appurtenances, the markers feature alternating black and retroreflective yellow stripes that slope downward at a 45-degree angle, directing traffic safely around potential hazards.

Spec • 2026
MUTCD Compliant

Sign Specifications

MUTCD Code

OM3-C

Sign Type

Object Marker

Shape

Diamond

Standard warning sign shape

Colors

ABC

Yellow background

Black legend

Compliance

MUTCD Compliant: Type 3 Object Marker per Section 2C.65. Marks roadside obstructions.

SizeDimensionsApplication
StandardDefault12x36"Roadside obstructions
Compliance & Certifications

MUTCD Compliant

Federal standards

DOT Approved

State & Federal

ASTM D4956

Type III/IV/XI

10+ Years

Durability

Recommended

High Intensity Prismatic (HIP)

Type: ASTM Type III/IV

Lifespan: 10 years

Brightness: ~360 cd/lux/m²

Traffic signs, work zones, roadways

Diamond Grade (DG3)

Type: ASTM Type XI

Lifespan: 10-12 years

Brightness: ~580 cd/lux/m²

Critical signs, freeways, overhead signs

Install on roadside obstructions. OM3-L for left side, OM3-R for right side, OM3-C for both directions. Red/white reflective.

MUTCD Reference: Section 2C.65

Reference: MUTCD Section 2C.65