attention
background
barricade
barrier
beacon
block
caution
cone
construction
danger
detour
drive
equipment
exit
flash
flasher
guard
hazard
highway
lamp
light
notice
object
orange
pavement
red
repair
road
roadside
safe
safety
sign
signal
site
slow
stop
street
stripe
striped
symbol
traffic
transportation
under
urban
warning
way
white
work
yellow
zone