This dimension groups transport infrastructure by whether it is still in active use, preserved or abandoned. A heritage railway, for instance, is "a railway operated as living history to re-create or preserve railway scenes of the past," per Wikipedia, a status quite different from an ordinary working line. Browsing by status separates infrastructure still doing its original job from infrastructure kept only for its history.
Facts
Comparison
Era of Emergence Status
Sources
1. Wikipedia: Royal Road
WikipediaRoyal Road, Achaemenid reconstruction, Roads Highways and Trade Routes subcategoryQuote, Royal Road, Achaemenid reconstruction, Roads Highways and Trade Routes subcategory
reorganized and rebuilt for trade in the 5th century BCE by the Achaemenid Empire
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