attention
auto
background
blue
border
closeup
cloud
clouds
cloudy
color
control
copyspace
cross
crossroad
danger
detail
end
forbidden
forefront
halt
highway
intersection
metal
nobody
object
octagon
outdoor
pole
prohibition
red
road
roadblock
roadsign
safety
sign
signal
single
sky
speed
stop
stopsign
symbol
text
traffic
transport
travel
warning
white