This made me curious about London's passenger or trip numbers, and I found this: https://tfl.gov.uk/corporate/about-tfl/what-we-do/london-underground/facts-and-

This made me curious about London's passenger or trip numbers, and I found this: https://tfl.gov.uk/corporate/about-tfl/what-we-do/london-underground/facts-and-figures https://tfl.gov.uk/corporate/about-tfl/what-we-do/london-und... 1.34 billion passengers (I presume 'trips') per year.