I really should know the answer to this, but, as I am replacing the (incorrect) traffic warning lights to the level crossing on SL with the correct style ones & refitting the barriers I need to know the function & sequence of the yellow lights.
I've done a google search & also looked on youtube & only got more confused - I though they operated similar to UK ones - the yellow would be on (steady) for a few seconds before the reds started flashing (by this time the yellows would be off) then the barriers would descend.
Some information tells me that the yellow flashes intermttantly when the it is clear to cross !
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