英文關鍵字
animation
background
barricade
blog
boundary
building
car
cartoon
check
closed
construction
control
crossing
design
entry
equipment
forbidden
gate
graphic
icon
illustration
industry
isolated
long
metal
motion
object
parking
protection
railroad
restricted
road
roadblock
safety
secure
security
sign
site
stop
street
style
symbol
system
traffic
transport
warning
web
white
working