That plugin is not part of the standard ux package, it's certainly part of some skin.
UX files bear the same names in both the original and the modified package, so this is no indication. Most of them cannot function without the rest of the skin ux files.
Look at Arimi's skin, as it is closest to the factory, its plugins can mostly work independently.
And as for traffic, all NextGen releases (except T4A) can display it with the appropriate entry in the sys file. Discussed many times.
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