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by shabble 5430 days ago
The closest I can think of is Personal Rapid Transport[1], which is a light-rail/monorail network of individually powered (small; 3-person or so) vehicles. Various schemes for routing have been proposed, many of which are conceptually similar to packet-routing of the carriages.

[1] https://secure.wikimedia.org/wikipedia/en/wiki/Personal_rapi...