TfL Journey Planner · Three-language journey planner for London, showing on a CRT monitor the shortest route between any two stations on the transport network · (TfL, 1963)
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A geodesic, the shortest path between two points in a mathematical space. Early urban cybernetic interfaces imparted this machine intelligence to citizens via origin-destination matrices placed at public transport nodes, introducing graph theoretic concepts to the urban masses. This TfL Journey Planner (1963) consists of separate origin and destination button matrices with a CRT monitor in the center. The machine communicates the shortest path between any two selected nodes.

A cybernetic form of urban mobility was born, a citizen’s behaviour increasingly expected to approximate the ‘rational agent’ used in urban computer models of the era.

The technology is now delivered online via a web interface and XSLT Trip Request API.

See Also: Cybernetics, Shortest Path, Network