What does a flashing yellow light mean for trains?

A flashing yellow, in Canada and the United States, at least on the top or middle heads if there is more than one light, means advance clear to stop (or alternatively advance approach) which means expect the next signal to be clear but not the one after.



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If the lights begin to flash or the bells begin to ring, STOP! A train is coming. You must yield to the train and remain stopped until the lights have stopped flashing and the gates have lifted. If there are multiple tracks, make sure the train you see isn't hiding another one you don't see.

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Red flashing lights and gates Some even have gates which cross the traffic lane. If the lights begin to flash or the bells begin to ring, STOP! A train is coming. You must yield to the train and remain stopped until the lights have stopped flashing and the gates have lifted.

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Yellow Aspect: Caution, proceed and preparing to stop at next signal.

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Flashing Signals A flashing red light has the same meaning as a STOP sign. You must come to a complete stop. Then, look both ways, and proceed only after the intersection is clear. A flashing yellow light means CAUTION.

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Look both ways down the track to see if a train is coming is one obvious solution. A train will sound it horn on the approach to any unmarked crossing, so listing for the train horn sounding is another way too. Why do fast train lines have platforms despite the trains on these lines never stop?

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Parts of the overhead wires (or the third rail) are left un-electrified in order to break the network up into manageable sectors (and to avoid some complicated electrical problems which I admit don't quite understand). When the train passes by one of these, it loses power, and the lights and ventilation go off.

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