access
approach
barrier
beware
black
block
caution
close
construction
cordon
cross
danger
do not
dots
enter
line
maintenance
outside
plastic
prevent
prohibit
protect
red
reflective
restrict
ribbon
risk
roll
safety
scene
security
sign
situation
speckle
stop
surround
tape
tie
tree
trespass
trunk
warning
work
wrap
zone