alert
asphalt
attention
barricade
barrier
boundary
build
building site
caution
closed
concrete
cone
construction
danger
forbidden
highway
indication
industrial
industry
lane
maintenance
marker
marking
object
obstacle
orange
pavement
plastic
protection
red
repair
risk ahead
road
roadway
roadwork
safety
security
sign
signal
single
site
street
striped
surface
symbol
traffic
trafficcones
transportation
under
warning