attention
background
caution
city
cleaning
cleanup
clear
clearing
construction
danger
dangerous
direction
emergency
ice
information
job
light
maintenance
metal
municipal
no
orange
outdoors
red
road
road repair
road sign
road signs
roadside
safety
service
sign
sign of repair work sign
signal
snow
snowy
stop
street
symbol
traffic
transport
transportation
travel
triangle
warning
way
white
winter
work
yellow