attention
barricade
barrier
boundary
caution
cone
construction
danger
equipment
fluorescent
group
hazard
hazardous
industry
maintenance
marker
marking
object
orange
plastic
pylon
reflect
reflective
repair
restriction
risk
road
roadblock
roadwork
safety
security
sign
signal
signs
stanchion
stop
stored
stowed
together
unused
urban
used
warning
work