英文關鍵字
accident
alternative
automated
automatic
autonomous
background
battery
black
blink
blinking
cars
caution
city
crosswalk
diode
emitting
energy
evening
foot
indicator
light
mode
modern
movements
night
pedestrian
person
pictogram
power
prevent
regulation
road
saving
sign
silhouette
source
square
street
support
technology
the
traffic
transition
triangle
use
vechicle
walk
warning
yellow