Transport for London (TfL), the agency responsible for the capital’s Tube, established a privacy-safe system for measuring passenger flow using wifi connections, yielding some interesting results.

Why it matters

Real-time data can optimise campaigns so that they reach the greatest possible number of passengers, but it can also keep them safe in an unprecedented crisis.

Takeaways

• A utility created for the London Olympics became a critical source of information for TfL and its media clients.
• A billion device connections collected each month can be stitched together, adding up to around 60 million journeys across the Underground network. Using these numbers,...