accident
asphalt
attention
barricade
barrier
border
boundary
careful
caution
city
closed
color
construction
control
danger
edge
line
nobody
object
orange
outdoor
plastic
portable
prevent
protection
protective
red
repair
risk
road
row
safety
security
sign
signal
site
stop
street
strip
stripe
striped
structure
symbol
traffic
transportation
urban
warning
white
work
zone