MUTCD W8-15P: Motorcycle Plaque
The W8-15P sign is covered in Section 6H.34 of the Manual on Uniform Traffic Control Devices, 11th Edition. Below are the provisions from that section that describe when the sign is used and how it is placed.
What it means and when it is used
- Option · Permitted (may)A Motorcycle (W8-15P) plaque (see Figure 6H-1) may be mounted below a LOOSE GRA VEL (W8-7) sign, a GROOVED PA VEMENT (W8-15) sign, a METAL BRIDGE DECK (W8-16) sign, or a STEEL PLATE AHEAD (W8-24) sign if the warning is intended to be directed primarily to motorcyclists.
Where to read the rest
- Full text: MUTCD Section 6H.34: Motorcycle Plaque
- Mounting height, lateral offset and retroreflectivity for any sign: MUTCD sign placement guide
Source: Manual on Uniform Traffic Control Devices, 11th Edition (Federal Highway Administration, December 2023, public domain). Excerpts are shortened and shown out of context; read the full section before specifying a sign. Your state may still be operating under the 2009 edition or a state supplement. Official manual: mutcd.fhwa.dot.gov.