WAC 468-95-306. Motorcycles use extreme caution supplemental plaque

Pursuant to RCW 47.36.200 , amend MUTCD Section 6H.34 to read: A supplemental plaque displaying the message motorcycles use extreme caution is added to MUTCD Figure 6H-1. Delete the Motorcycle symbol (W8-15P) plaque from Figure 6H-1. The motorcycles use extreme caution (W21-1701P) plaque (see Figure 6H-1) may be mounted below a loose gravel (W8-7) sign, a grooved pavement (W8-15) sign, a abrupt lane edge (W21-801), 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.