Study discovered higher rates of airborne infections in Londoners that have longer subway journeys through busier terminals.
From 2023, new spacious Inspiro London trains will be delivered for testing on the Piccadilly line.
Ridership on the London Underground has dropped for the first time in more than 20 year.
More than 600 apps are now being powered specifically using TfL's open data feeds used by 42% of Londoners.
The new map shows customers routes they can take to avoid areas with large stretches of tunnels.
The new payment app, Samsung Pay, which can be downloaded from the Samsung Galaxy Apps store, supports MasterCard and Visa credit and debit cards from major UK financial institutions.
Hesop works by converting and transferring any unused power, generated by the trains during braking, to the medium voltage loop for re-use within the network.