英文關鍵字
appear
background
blue
boards
car
city
cloud
color
control
cross
crosswalk
danger
direction
drive
electric
electronic
equipment
front
green
isolated
lamp
light
lights
motion
object
outdoor
place
pole
red
regulation
road
safe
safety
semaphore
shiny
sign
signal
single
sky
slow
stay
stop
stoplight
street
summer
sun
symbol
system
that
traffic
transport
transportation
travel
travelling
urban
wait
warning
white
yellow