abstract
accident
area
attention
background
barricade
barrier
barriers
black
border
caution
construction
danger
dangerous
diagonal
factory
forbidden
grunge
hazard
hazardous
industrial
line
mark
paint
pattern
people
police
protect
protection
restricted
restricted area
safety
security
sign
site
stop
strip
stripe
striped
stripes
symbol
tape
territory works
traffic
urban
warning
warning tape
yellow
zone