This dimension groups transport infrastructure by what it was actually built from. Wikipedia notes that "most bridges consist of a flat deck, supported by beams, arches, or cables," and the material chosen shapes how long a structure lasts and what it can carry. Browsing by material lets a visitor compare structures built the same way even when they serve very different routes.
Facts
Comparison
Era of Emergence Material
Sources
1. Wikipedia: Arkadiko Bridge
WikipediaArkadiko Bridge, datingQuote, Arkadiko Bridge, dating
The corbel arch bridge was constructed during the Mycenaean Period in a typical Cyclopean style contemporary to the Late Helladic period (III) (ca. 1300-1190 BC).
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