英文關鍵字
attention
sign
maintenance
detour
obstacle
roadwork
build
signal
transportation
safety
city
improvement
cone
traffic
warning
alert
direction
restriction
street
asphalt
lane
car
driving
bypass
barricade
limit
urban
fix
security
work
site
closed
service
reconstruction
industry
line
road
construction
roadside
turn
highway
under
caution
vehicle
repair
barrier
equipment
danger