Warning signs
Left Curve sign
The road ahead bends to the left. Reduce speed before entering the bend.
- Diamond
- Yellow
- MUTCD W1-2L
How to recognize it
Shape and background first
ShapeDiamonda diamond stood on its point
BackgroundYellowyellow, the warning color
FamilyWarning signsFederal designation W1-2L in the MUTCD.
Federal designation W1-2L in the MUTCD, the national standard every state signs to.
What the MUTCD specifies
Designation: W1-2L
MUTCD Section 2C.07
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
Any advisory speed on a yellow plate under a curve sign assumes dry pavement and good visibility. In rain the safe speed is lower, and questions about wet curves are testing exactly that.
Same family
