background
car
caution
clouds
communication
concepts
control
danger
direction
exit
halt
highway
information
landscape
low
many
message
metal
nobody
object
octagon
outdoor
outdoors
outside
parking
pole
post
red
road
roadside
row
safety
sign
signage
signal
single
sky
speed
stop
street
symbol
text
traffic
transport
transportation
travel
view
warning
way
white