What Transport for London Learned While Tracking Users for a Month in 2016

Public transit agencies don't normally get the kind of fine-grained location and navigation data made possible by tracking phones. London got temporary access to that info at the end of 2016, however.

1 minute read

February 14, 2017, 6:00 AM PST

By James Brasuell @CasualBrasuell


London Underground

pisaphotography / Shutterstock

James O'Malley reports on the results of a pilot project conducted at the end of 2016 in London: between November 21 and December 19, Transport for London (TfL) tracked the phone on anyone with a WiFi connection enabled while navigating the London Underground.

O'Malley got the first crack at the "utterly fascinating findings that the agency has been able to make from all of our data," while acknowledging that TfL has to justify the collection of all this data.

"Perhaps the number one reason to do the trial was to better understand the journeys that people actually make on the Tube," writes O'Malley in relaying the case made by officials at TfL. The new WiFi data, combined with existing sources of data, offers new insight into route tracking, in-station tracking, and, in a potentially more controversial use for the tracking, data for advertisers.

The first two benefits of the tracking should help with site and system planning efforts in the future, and O'Malley digs into some of the data shared by TfL to get an idea of how the data might improve planning efforts in the future. 

Monday, February 13, 2017 in Gizmodo UK

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Aerial view of town of Wailuku in Maui, Hawaii with mountains in background against cloudy sunset sky.

Maui's Vacation Rental Debate Turns Ugly

Verbal attacks, misinformation campaigns and fistfights plague a high-stakes debate to convert thousands of vacation rentals into long-term housing.

July 1, 2025 - Honolulu Civil Beat

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

July 2, 2025 - Diana Ionescu

White and purple sign for Slow Street in San Francisco, California with people crossing crosswalk.

San Francisco Suspends Traffic Calming Amidst Record Deaths

Citing “a challenging fiscal landscape,” the city will cease the program on the heels of 42 traffic deaths, including 24 pedestrians.

July 1, 2025 - KQED

Google street view of red brick multi-story power plant building in Pittsburgh, PA.

Defunct Pittsburgh Power Plant to Become Residential Tower

A decommissioned steam heat plant will be redeveloped into almost 100 affordable housing units.

July 4 - Pittsburgh Post-Gazette

Cyclist on protected bike lane in middle of street in Washington D.C. with Washington Monument obelisk visible in background.

Trump Prompts Restructuring of Transportation Research Board in “Unprecedented Overreach”

The TRB has eliminated more than half of its committees including those focused on climate, equity, and cities.

July 4 - Streetsblog USA

Blue and silver Amtrak train at small station.

Amtrak Rolls Out New Orleans to Alabama “Mardi Gras” Train

The new service will operate morning and evening departures between Mobile and New Orleans.

July 3 - New Orleans City Business