This dimension groups a mode of transport with the other modes that share its basic technology, rail transport with other forms of guided land transport, for example. Wikipedia describes rail transport as "a mode of transport using wheeled vehicles running on tracks, which usually consist of two parallel steel rails," a shared mechanical family even when the specific railway differs. Browsing by mode family keeps technologically related modes together.
Facts
Comparison
Era of Emergence Mode Family
Sources
1. Wikipedia: History of aviation
WikipediaHistory of aviation, 21 November 1783 Montgolfier flightQuote, History of aviation, 21 November 1783 Montgolfier flight
On 21 November, the Montgolfiers launched the first free flight with human passengers.
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