alert
attention
background
blue
car
circle
circular
city
communication
concept
construction
danger
design
forbidden
graphic
illustration
law
limit
metal
no
not
park
parking
pole
prohibit
prohibited
prohibition
rectangle
rectangular
red
restriction
road
roadsign
round
safety
shiny
sign
signage
signal
sky
street
symbol
traffic
transportation
travel
warning
white
work