MUTCD W8-15: Warning Signs and Plaque for Motorcyclists

The W8-15 sign is covered in Section 2C.31 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)
  If a portion of a street or highway features a roadway pavement surface that is grooved or textured instead of smooth, such as a grooved skid resistance treatment for a horizontal curve or a brick pavement surface, a GROOVED PA VEMENT (W8-15) sign (see Figure 2C-7 ) may be used to provide advance warning of this condition to motorcyclists, bicyclists, and other road users. Alternate legends such as TEXTURED PA VEMENT…
• Option · Permitted (may)
  If a bridge or a portion of a bridge includes a metal or grated surface, a METAL BRIDGE DECK (W8-16) sign (see Figure 2C-7 ) may be used to provide advance warning of this condition to motorcyclists, bicyclists, and other road users.

Placement and mounting

• Option · Permitted (may)
  A Motorcycle (W8-15aP) plaque (see Figure 2C-7 ) may be mounted below or above a W8-15 or W8-16 sign if the warning is intended to be directed primarily to motorcyclists.

Where to read the rest

• Full text: MUTCD Section 2C.31: Warning Signs and Plaque for Motorcyclists
• Minimum sign sizes by roadway type are in the size section for this chapter: Section 2C.03
• Mounting height, lateral offset and retroreflectivity for any sign: MUTCD sign placement guide

Related signs in Section 2C.31