機器
architecture
asphalt
barrier
bridge
build
building
bulldozer
city
closed
concrete
constructing
construction
danger
detour
development
dirt
earth
equipment
grading
heavy
highway
industrial
job
machinery
orange
pave
pavement
paving
repair
road
roads
sign
signs
site
street
technology
traffic
transportation
urban
vehicle
warning
work
workers
working