alertness
asphalt
barricade
beckoning
block
blocked
boundary
caution
city
closed
color
construction
construction site
construction worker
danger
digging
frame
information
manual worker
pavement
pedestrian
problems
reconstruction
repair
road
road crew
road sign
roadblock
roadside
safety
security
sign
signal
signs
site
street
symbol
tool
traffic
triangle
under construction
urban
warning
work
workers
working
works
yellow
zone