architecture
bridge
building
cement
concrete
construct
construction
crew
danger
dangerous
equipment
frame
freeway
grid
helmet
highway
industrial
industry
infrastructure
intersection
labor
laborer
lower
mainroad
massive
men
motorway
occupation
people
pillar
ramp
risk
road
roadway
route
safety
steel
straight
structure
support
team
teamwork
transportation
urban
way
work
workers
workmen