3d
abstract
alert
attention
background
barricade
barrier
block
border
boundary
build
caution
closed
concept
cone
construction
danger
design
equipment
forbidden
highway
icon
industrial
industry
isolated
light
maintenance
metal
obstacle
orange
plastic
protection
repair
road
safety
security
sign
signal
site
stop
street
striped
symbol
traffic
transportation
under
warning
white
work