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