英文關鍵字
signal
road
urban
sign
street
light
traffic
red
city
green
control
transportation
safety
symbol
stop
warning
danger
semaphore
transport
stoplight
background
lamp
close-up
way
color
pedestrian
closeup
caution
outdoors
travel
crossroad
crosswalk
car
change
intersection
illuminated
close
walk
crossing
cross
drive
equipment
highway
attention
electric
motion
regulation
large
regulating
movement
pedestrians
safe
people
switches