8 sided
area
attention
background
black
blank
board
brake
caution
chalk
color
concept
copy
copy space
danger
dark
direction
down
empty
gray
grey
highway
icon
idea
image
instruction
law
legal
metal
object
photo
red
road
rules
safety
shape
sign
slow
space
speed
stop
street
symbol
text
traffic
transport
transportation
warning
white