What signs are allowed since FLAGGER (W20-7a) & WORKERS (W21-1a) signs shall not be used in New York State according to the NYS Supplement?
Generally, symbol signs are preferred since they can be seen 50 percent sooner that the same sign as just text. For many signs, there is a text version in the National MUTCD, but such signs shall not be used in New York State in many cases. Instead, use the symbol sign. The “a” designation typically refers to the text version of such signs.
Here are the two symbol signs where the text version is not allowed for use in New York State.
- MUTCD Section 6F.31 Flagger Signs (W20-7, W20-7a)
- MUTCD Section 6F.33 Workers Signs (W21-1, W21-1a)
Note that the 2004 Standard Highway Signs and Markings Book has an incorrect designation for the signs. The 2012 Supplement to the 2004 Edition has the corrected sign designations.
Anytime there is a symbol and text version of a sign, be sure to check the NYS Supplement to the MUTCD to check if it is allowed in New York State.
Text from NYS Supplement (Sections 6F.31 & 6F.33)
The FLAGGER (W20-7a) sign shall not be used in New York.
The WORKERS (W21-1a) sign shall not be used in New York.