access
accident
area
attention
background
banner
barricade
barrier
border
caution
close
construction
cordon
crime
criminal
cross
danger
design
element
forbidden
horizontal
industrial
investigation
isolated
line
murder
not
order
perimeter
police
protection
red
restricted
restriction
ribbon
safety
scene
seamless
security
sign
stop
strip
stripe
tape
urban
warning
yellow
zone
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