asphalt
attention
background
barricade
barrier
block
border
boundary
build
car
caution
city
closed
cone
construction
danger
drive
empty
equipment
fence
forbidden
highway
industrial
industry
modern
nobody
orange
outdoor
plastic
polymer
protection
red
repair
road
roadway
safety
security
shape
sign
signal
site
stop
street
traffic
transportation
urban
warning
way
white
work