access
accident
area
attention
background
banner
barricade
barrier
black
border
caution
color
construction
crime
criminal
cross
danger
evidence
forbidden
icon
image
industrial
law
line
murder
object
perimeter
police
protection
restricted
restriction
ribbon
risk
safe
safety
scene
security
sign
strip
stripes
symbol
tape
text
urban
violence
warning
white
work
yellow
zone