accident
area
art
attention
background
banner
barricade
barrier
black
blocking
bright
caution
color
concept
construction
cordon
cross
danger
design
entry
forbidden
hazard
illustration
investigation
isolated
line
no
nobody
object
pattern
plastic
police
prohibited
restricted
restriction
ribbon
road
safety
scene
secure
security
sign
stripe
striped
stripes
symbol
tape
warning
white
yellow