Railway traffic light signal system.
Schlüsselwörter
railway,
traffic,
light,
signal,
post,
rail,
train,
track,
transport,
signs,
warning,
safety,
railroad,
guide,
control,
indicator,
marker,
semaphore,
direction,
information,
caution,
stop,
go,
light,
colours,
code,
system,
communication,
transportation,
infrastructure,
network,
pathway,
route,
conductor,
locomotive,
passenger,
freight,
commuter,
suburban,
urban,
rural,
landscape,
architecture,
engineering,
mechanical,
electrical,
metal,
steel,
structure
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