英文關鍵字
architecture
attention
background
building
car
caution
city
color
countdown
cross
danger
digit
digital
display
downtown
drive
electric
equipment
five
green
information
lamp
law
light
modern
object
old
red
road
rules
safety
scene
seconds
security
sign
signal
speed
stop
street
technology
time
timer
town
traffic
transport
transportation
urban
warning