Oyster Flowprint

From Anil Bawa-Cavia and Urbagram, The Oyster Flowprint. Oyster is the London transit payment system. The movie shows the flows on the system across the day.

This Oyster flowprint visualises trips made using London's RFID transport card on the London Underground on a typical weekday. Each trail is an individual passenger making a trip, tapping their card at an origin and destination. The actual routes taken are inferred using a simple shortest path algorithm. The animation uses a 5% sample of passengers on the network made available as a Transport for London Data Feed.

Activity on the network is charted along the bottom of the graphic. The double-humped dynamics typical of commuting are evident, and these constitute the characteristic signature of the living city. Twice a day the flowprint expands and contracts, sending its tendrils deep into North London; the diurnal 'pulse' of the city in action.

Synchronisation of travel during the morning rush hour, with a steep ramp in activity peaking at 8:40AM, is much greater than during the afternoon, which sees a much broader peak in activity, with people leaving work at a range of times. The afternoon rush hour doesn't subside until after 7pm, evidence perhaps of Londoner's love of an after-work pint.

Oyster Flowprint from Anil Bawa-Cavia on Vimeo.

David Levinson

Network Reliability in Practice

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This page contains a single entry by David Levinson published on March 8, 2011 6:53 PM.

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