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