機器
asphalt
background
barrier
block
caution
closed
concrete
cone
construction
danger
equipment
gravel
highway
improvement
industrial
industry
job
machinery
maintenance
orange
pave
pavement
red
renewal
repair
road
roadwork
roadworks
safety
security
sign
signal
site
stop
street
surface
symbol
tar
traffic
transport
transportation
travel
urban
vehicle
warning
white
work