ahead
alert
area
attention
auto
background
black
car
caution
closeup
construction
danger
driving
dusty
figure
grunge
isolated
metal
notice
obstacle
obstruction
orange
outdoors
progress
red
restoration
road
roadworks
safe
safety
sign
signage
signal
site
stop
street
symbol
temporary
traffic
triangle
wait
warning
way
white
work
yellow
zone