Warning signs
Bump sign
A raised section of pavement is ahead. Slow down before you reach it.
- Diamond
- Yellow
- MUTCD W8-1
How to recognize it
Shape and background first
ShapeDiamonda diamond stood on its point
BackgroundYellowyellow, the warning color
FamilyWarning signsFederal designation W8-1 in the MUTCD.
Federal designation W8-1 in the MUTCD, the national standard every state signs to.
What the MUTCD specifies
Designation: W8-1
MUTCD Section 2C.26
Conventional road size: 30 x 30 in
Source: Federal Highway Administration, MUTCD 11th Edition (December 2023), Part 2, Table 2C-1, verified 2026-09-26.
On the test
What the test wants you to know
The mistake people make
Simple sign, but it appears in tests as a distractor against dip and rough road. Read the picture rather than assuming.
Same family
