accident
alert
asphalt
attention
background
barrier
caution
cone
construction
control
danger
design
emergency
equipment
forbidden
hazard
highway
lane
line
marking
object
orange
plastic
protection
red
reflective
repair
road
roadwork
safe
safety
security
series
shiny
sign
signal
site
stop
street
stripe
striped
symbol
traffic
transportation
walk
warning
way
white
work