arduous
barrier
building lot
channel
channel worker
cleaning
congested
construction
construction site
cordoned
craft
culvert
danger
dangerous
free
granite
handcraft
helper
manhole
manhole cover
outdoor
outside
reconstruction
redecoration
refurbishment
remedial action
renovation
restoration
restructuring
roadman
roadworks
roustabout
safe
safety
save
sewer
stone
street
streetwork
streetworks
strenuous
stressful
structure
unsafe
unskilled
work
worker
workman