英文關鍵字
animated
animation
arrow
background
black
caution
concept
construction
danger
direction
directional
drive
flying
forming
global
graphic
highway
icon
information
limit
many
metal
pedestrian
pointer
polluting
pollution
red
road
roadsign
safety
shine
shiny
sign
signs
speed
stop
street
symbol
traffic
transport
transportation
travel
under
vehicle
warning
way
world