In the Vinony graph
It is catalogued under the topic Modules that add a tracking category.
Its subject is documented across 50 Wikipedia language editions.
~12 min read
Encyclopedic overview
Module documentation
This module is used to implement Template:Jct, Template:Jctname, and Template:Roadlink.
Excerpted from Wikipedia’s “Module:Jct” article, available under the CC BY-SA 4.0 licence.