access
accident
area
attention
background
banner
barricade
black
board
caution
construction
copy space
crime
danger
dangerous
design
diagonal stripes
evidence
forbidden
hazard
hazardous
illustration
industrial
industry
information
isolated
line
notice
police
protection
restriction
risk
road
safety
security
sign
space
street
striped
stripes
symbol
tape
traffic
urban
wallpaper
warning
work
yellow
zone