英文關鍵字
blue
car
change
city
color
concept
control
cross
crossing
crossroad
drive
driving
glowing
green
illuminated
information
journey
light
lights
night
object
red
rules
safe
safety
semaphore
set
sign
signal
sky
stop
stoplight
street
sun
sunlight
symbol
technology
traffic
transport
transportation
travel
urban
warning
way
yellow
yes