traffic sign
404
access
alert
barrier
car
caution
construction
control
cross
crossing
danger
equipment
error
forbidden
gate
in construction
iron
locomotive
metal
page
rail
railroad
railway
red
road
safety
server
sign
signal
signs
speed
station
steel
stop
stops
street
symbol
track
traffic
train
transport
transportation
travel
wait
waiting
warning
way
web
yellow