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Template:POTD/2012-04-15

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Level junction
A level junction interlaced turnout at Chicago Transit Authority signal tower 18 on the elevated Chicago 'L'. Known as a "flat crossing" in the United Kingdom, this type of railway junction allows trains to cross over in front of opposing traffic at grade (i.e., on the level).

The opposite of a level junction is a flying junction, where individual tracks rise or fall to pass over or under other tracks.Photo: Daniel Schwen