accident
attention
barricade
barrier
boundary
caution
cobbled
concept
construction
control
crime
danger
dangerous
design
entry
equipment
fence
forbidden
hazard
industry
line
material
no
no people
outdoor
plastic
police
protect
protection
red
repair
restricted
restriction
ribbon
risk
safety
scene
secured
security
sign
stop
stripe
striped
symbol
tape
traffic
urban
warning
white
zone