accident
artifact
attention
background
blank
blue
car
care
caution
color
control
copy space
day
electricity
equipment
go
green
illumination
intersection
japan
japanese
lamp
lantern
light
no body
no people
object
outdoor
power
red
regulate
road
safety
sign
signal
space
stop
stoplight
street
streetlight
symbol
town
traffic
transportation
travel
trouble
walk
warning
way
yellow