A group of traffic lights at a railway crossing.
Palabras clave
grade,
notice,
raised,
shipment,
hazard,
logistic,
position,
signal,
no people,
post,
shipping,
warning,
caution,
movement,
stop,
california,
three,
highway,
train,
way,
traffic,
arm,
message,
safety,
track,
carrier,
horizontal,
transport,
motion,
industrial,
blinking,
danger,
cross,
light,
gate,
rail,
white,
symbol,
red,
railway,
railroad,
blue,
sky,
signs,
road,
travel
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