accident
area
attention
background
banner
barricade
barrier
black
blue
border
boundary
cartoon
caution
collection
construction
crime
criminal
cross
danger
flat
forbidden
illustration
industrial
isolated
law
line
murder
no
not
police
protection
restricted
restriction
ribbon
risk
safety
scene
security
set
sign
strip
style
tape
text
urban
vector
violence
warning
work
zone