area
attention
background
barrier
blocking
building
closed
closeup
cloudy
concept
construction
danger
day
direction
entry
fence
forbidden
green
industry
information
instruction
line
no
nobody
outdoors
outside
prohibition
protection
reconstruction
red
repair
roadwork
round
rule
safety
security
sign
silhouette
slab
snow
stop
storage
symbol
table
tree
trouble
warning
white
winter
work