alert
auto
background
block
car
caution
circle
clouds
concept
danger
direction
driving
end
enter
entrance
entry
forbidden
graphic
halt
icon
no
not
pause
police
problems
prohibition
protest
rectangle
red
road
roadsign
round
safety
sign
signal
sky
speed
stop
stopsign
street
symbol
technology
traffic
transport
transportation
warning
white
zone