英文關鍵字
allowed
background
caution
city
color
concept
control
cross
crossing
crossroad
cutout
danger
direction
drive
driveway
equipment
green
guidance
highway
information
intersection
lamp
light
man
object
pedestrian
red
regulate
road
route
safe
safety
second
security
semaphore
sign
signal
speed
stop
street
symbol
timer
town
traffic
transport
transportation
urban
walk
warning