英文關鍵字
blue
build
car
caution
city
construction
crosswalk
danger
dangerous
equipment
exterior
gate
highway
infrastructure
lights
panel
pavement
protection
reconstruction
red
road
safe
safety
security
sidewalk
sign
signal
signs
site
speed
stop
street
symbol
tool
track
traffic
transport
transportation
travel
triangle
urban
vehicle
warning
worker
works
yellow