A track, path, or railroad line that crosses another track, or a cross-connection between parallel tracks.
From 'cross' (Old English/Old French 'croix') combined with 'track' (from Middle English 'trak', likely from Old Norse 'trakka'). Technical term developed in railroad and utility infrastructure vocabulary.
Railroad yards depend on crosstracks—these perpendicular connections allow trains to switch from one parallel line to another, and complex switching patterns can redirect a train to almost anywhere in a massive freight yard with just a few lever pulls.
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