alert
attention
background
black
caution
city
conditional
construction
copyspace
danger
dig
forbidden
graphic
gravel
ground
heap
industry
information
infrastructure
maintenance
obstacle
obstruction
outdoor
precaution
prohibition
reconstruction
red
repair
restriction
road
roadside
roadworks
safety
sand
side
sign
silhouette
site
sketchy
street
symbol
temporary
triangular
unavailable
urban
warn
work
yellow