Work zone signs
Flagger Ahead sign
A person controlling traffic is stationed ahead. Follow their directions.
- Diamond
- Orange
- MUTCD W20-7
How to recognize it
Shape and background first
ShapeDiamonda diamond stood on its point
BackgroundOrangeorange, used only for temporary work zones
FamilyWork zone signsFederal designation W20-7 in the MUTCD.
Federal designation W20-7 in the MUTCD, the national standard every state signs to.
What the MUTCD specifies
Designation: W20-7
MUTCD Section 6H.15
Conventional road size: 36 x 36 in
Guidance: Use the Flagger sign before a location where a flagger controls traffic.
Source: Federal Highway Administration, MUTCD 11th Edition (December 2023), Part 6, Table 6H-1; Section 6H.15, verified 2026-09-26.
On the test
What the test wants you to know
The mistake people make
A flagger's instructions carry the same legal weight as a traffic signal and override the signs around them. That hierarchy is a standard exam question.
Same family
