attention
background
blue
border
car
caution
clear
clouds
color
communicatio
danger
design
direction
drive
forbidden
highway
information
landscape
low
message
metal
navigation
nobody
object
octagon
outdoors
pole
prohibited
red
road
roadside
safety
sign
signal
speed
stop
street
symbol
text
traffic
transport
transportation
travel
trip
vertical
warning
way
white