traffic sign
barrier
caution
climate
cross
cross danger
danger
dangerous
electric
electrical
evening
gambling
germany
green
land
lightning
line
nature
outdoors
platforms
power
rail
rail transport
railroad
railway
red
risk
signal
sky
speed
station
stop
stop waiting
storm
sunset
symbol
tourist
track
train
train tracks
transport
transportation
voltage
volts
warning
warning label
warning sign
warning signal