alert
asphalt
attention
background
barricade
barrier
building
car
caution
city
closed
cone
construction
danger
detour
equipment
highway
industrial
industry
line
maintenance
men at work
orange
pavement
paving
repair
road
roadway
roadwork
roadworks
safety
security
sign
signal
site
stop
street
symbol
traffic
transport
transportation
urban
vehicle
warning
work