access
accident
alert
attention
ban
bus
car
caution
circle
danger
design
enter
entrance
entry
forbid
forbidden
graphic
hazard
icon
illustration
information
isolated
no
not
object
pole
prohibited
red
restriction
road
roadsign
round
rule
safety
school
security
sign
signal
stop
stop sign
street
symbol
traffic
transit
transport
transportation
warning
way