英文關鍵字
traffic
light
pedestrian
signal
green
change
red
stop
city
urban
walk
crossroad
cross
road
sign
street
intersection
safety
flash
warning
agree
danger
snowy
winter
nighttime
attention
lamp
transport
accident
go
switch
allow
permission
person
wait
nobody
decision
symbol
crosswalk
ban
area
end
safe
caution
electric
grant
semaphore
stoplight