access
attention
background
ban
blank
boundary
caution
circle
danger
direction
do
enter
forbid
forbidden
hand
hazard
icon
illustration
information
intersection
isolated
message
no
not
notice
octagon
octagonal
pictogram
prevent
prohibited
public
red
regulation
restricted
road
round
safety
set
sign
signal
stop
street
symbol
traffic
transport
transportation
warning
way
white