accessory
accident
asphalt
attention
background
barricade
barrier
block
border
bright
building
caution
colore
construction
control
crash
danger
engineering
equipment
ground
highway
industrial
light
line
object
orange
post
protection
red
repair
road
safe
safety
security
set
shape
sign
signal tique
single
solid o
stripe
structure
symbol
traffic
transport
transportation
urban
vehicles
warning
work