Because the system depends onMobile phoneThe MAC address that is automatically sent to the Wi-Fi access point when trying to connect, so the only way to opt out of this system is to completely turn off the phone's Wi-Fi. However, TfL will anonymize the data it collects, and the MAC addresses will be tokenized, which means they will be replaced with identifiers that cannot be traced back to the smartphone or the customer who owns it. The shipping authority stated that it will not collect any browsing or historical data from the equipment.
The purpose of tracking is to better understand how people use the subway network and provide real-time information about the level of site congestion. London Transport has been able to use tickets to find out which stations people travel between, but starting later this year, London Underground staff will have access to crowd data to provide better travel advice. TfL also plans to post congestion alerts through its website and social media channels.
Perhaps more importantly, demographic data will also be available through the agency's existing APIs, which in theory allows map companies such as Google Maps and Citymapper to customize their public transportation advice to avoid highly congested areas. TfL said the plan will also use its advertising space through actual passenger volume, such as a large number of passengers passing through a corridor, and TfL hopes the data will be available to potential advertisers.