abstain
allowed
attention
background
ban
bike
biker
caution
chopper
circle
crossing
danger
deny
design
engine
forbid
forbidden
icon
information
motor
motorbike
motorcycle
no
noise
not
notice
permission
prohibit
prohibited
prohibition
red
regulation
restrict
restricted
restriction
ride
road
rule
sign
signage
signboard
silhouette
stop
symbol
traffic
vector
vehicle
warning
white
zone