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Warning · Diamond · MUTCD 11th edition

OM4-1 Object Marker Type 4 (nine red reflectors on black)

OM4-1 Object Marker Type 4 (nine red reflectors on black) sign from the MUTCD 11th edition: standard size (18" × 18"), with colors.

Open this sign in the editorStandard sizes
OM4-1
Drawn at 18" × 18"

01

Standard sizes

SizeRoad typeCorner radius
18" × 18"—1 1/2"

02

Colors

Legend
Red
Background
Black

03

Standard reference

  • SHS 2024 sheet 3-244 (OM4-1); MUTCD 11th ed. Section 2C.63