e/Wig wag (train).

Information
has gloss	eng: Wigwag is the nickname given to a type of early, North American, 20th century, railroad grade crossing signal, so named due to the pendulum-like motion it used to signal the approach of a train. It is generally credited to Albert Hunt, a mechanical engineer at Southern California's Pacific Electric (PE) interurban streetcar railroad, who invented it in 1909 out of the necessity for a safer railroad grade crossing. The term should not be confused with its usage in Britain, where wigwag is generally used to refer to alternate flashing lights, such as those found at modern level crossings.
lexicalization	eng: Wig wag (train).
lexicalization	eng: Wig wag
lexicalization	eng: Wig-wag
lexicalization	eng: wigwag
instance of	(noun) intersection of a railway and a road on the same level; barriers close road when trains pass grade crossing, level crossing

Media
media:img	Dan redlands wigwag.jpg
media:img	Dan santa cruz wigwag.jpg
media:img	RoundPrairieWigwag.jpg
media:img	Wigwag guts.jpg
media:img	Wigwag signals near Devil's Lake.jpg